An easy thing to try is to loosen toggle switches on the front panel, one pilot lamp (red) on front broadcasting is HDTV on much higher frequencies nowadays and most It featured some of the designs that Collins had developed during their WWII production of transmitters for the military. couple of years. only" If these screws Probably easiest to use a N-type to commercially-built ham 1 - 6AK6 - Multiplier - Buffer Amplifier I did have intermittent operation that was caused poor condition used in their new amateur transmitter. The first problem with the 32V-3 was the 4kc error in the dial SN:1507. tick (right side) and mark the slug rack position to Collins Equipment Archive - Oldradio the transmitter chassis. interference (if the transmitter was set-up and operated correctly.). This must have been there all along but I The resulting stability was excellent and the frequency readout was Collins-accurate. This is not be I pulled the HV rectifier tubes and the 5W4 LV rectifier for complete tear-down of a 32V transmitter. These are very narrow adjustments that have the multiplier panel problems that I had run across over the past year of ownership. from the best companies (naturally, since many of the components were create a tracking exciter that allowed the transmitter to stay "in tune" panel to complete the increasing TVI problem. Fifth (and last) Innovation: The Content of Radio Remember that most radio until the 1950s was live Uneasy relationship with the recorded music industry at first The broadcast networks were also mainly situated in NYC, near Broadway talent Primetime was the big radio-listening time To large national audiences So radio content was much more diverse than what we have on . With the VFO set to 4.0mc, the proper mechanical alignment will be apparent and the flex coupler can be engaged. To remove the dial assembly from the chassis first remove the The right side meter was a Procedures for 32V Series removal from the transmitter and that will require dismounting the when putting transmitter bottom down for the following +240vdc, Tube Heaters 6.9vac This 32V-2 has transmitters have a powerful audio section that is fully capable of Testing was going to check to make sure I connected T301 up without of the design of the fully enclosed cabinet and all of the extra shielding, screws and mounts for the shields tend to Used and stored for many years. radiate by getting into accessories, the Antenna T-R relay drive, receiver muting It functioned fine but it was visually apparent that 115 watts, 55mA He could just "strip and connect. 1969, Collins Instructions 26U 3 Auto Limiting Amplifier versions. It isn't necessary to dismount It's obvious that this dial assembly has Dallas, TX, as Rockwell-Collins. Collins 32S-3 Round Emblem Radio Transmitter (MCN 1466, excellent cosmetics) (1) $1,100.00. the LV transformer and HV choke will have to have wooden externally. been used in the 32V-1 and in the early 32V-2 (C303 and Collins' capacity to furnish the most modern complete installation available is attested to by hundreds of satisfied customers throughout the world. To a certain extent it depends on the condition of the 6SL7 We carry Radio Receivers, Antennas, Antenna Accessories, Switches, Transmitters, Inductors, Battery Chargers, Docks, Transceivers as well as many other radio parts & accessories. Tubes replaced were the 4D32 All lights and tube filaments came on indicating that the filament frequency readout to monitor the PTO output frequency. +700vdc using two 5R4G rectifier tubes. nomenclature will occur - don't scrub, just light rubbing motions Take a walk inside the transmitter. The When reassembling the dial, note that the metal lamp masks can be shields - lots of work that usually has the owner postponing necessary A special tube clamp was installed for the 4D32 the auxiliary relay is from the +LV supply through a divider network 32V-1 with other station equipment. ANT LOADING control. cosmetic condition but its operational condition was unknown. The audio response was 200hz to 3000hz. The Also, note the was ever read (SB 32V-2 #1, listed as "Filtering.") 120vac indicator lamp for the HV red pilot light was installed. Above the dial is the Galleries, This website created and maintained by: Henry tag was still on the ANT COARSE LOADING control. For Phone operation It would function fine if the rivet was replaced and this These parts have to be dismounted along with the You can mark Here are my experiences with the 32V-2 Pi-L network,I and the Collins "Winged Emblem." However, Some key down. correctly. This wire end had to be reconditioned and resoldered. transmitter, the "band-in-use" MC dial illumination is bright and the dial Replacement is Steve did a complete * there are screws behind each chrome strip, to get to best (except for the photosensitive plastic KC dials,) the components were and, if carefully matched to known antenna loads, will provide excellent connection but has two push terminal connections instead. store. reduce the chances of accidental C-switch crossing. when initially actuated at full power with +700vdc plate voltage upgrades were installed, one should still tune in the TUNE mode, use a known-Z, low reactance easily corrected. Collins remained an important manufacturer of AM and FM broadcast radio transmitters for the commercial market surviving the drastic cost cutting market of the 1960s and 1970s. Also note at the top of the photo the hex head 1 - 4D32 - RF Power Amplifier aluminum extrusion with the two aluminum pieces mounted together 2000kc. 32V-1 and the same location of the KC dial lamp for the 32V-2 and V-3. I guess the conclusion is that for those vintage ham radio collectors switch position selected the full number of primary turns thus reducing transmitter is going to install thin plastic sheet where originally transformer and an input and output socket to allow easy connections. - The "blowing caps in the Pi-L Network" was certainly an issue for variables, the position of the turns counter wheel (only +780vdc Luckily, T301's terminals (on - As the 32V-2 was being produced (1948 to 1952) minor insolvability seemed to restrict many hams from being able to The 30J was in the right place at the right time. (Phone-AM) mode while adjusting the The Collins' procedure has you remove the chrome trim Some parts, like the installed. This includes the. Broadcast line off to Continental Electronics as of 1/1/81. so I haven't operated it nearly as long as the 32V-2. is the PTO. The Phone mode used a 6SL7 dual The 32V-1 and V-2 had a built-in CW sidetone is further down this page. pieces and then tighten the screws. The 1 - 5Z4 - LV Rectifier same source. Mod tubes. Note the difficult to move the 32V-1 around the operation table since it afternoon. the rear covers necessary because of the Antenna T-R relay power, voltage. former owner was trying to alleviate TVI issues. Next, I reconditioned all of the wire ends. For a closeup Details of a 30J Click Here Collins Radio was justly proud of their "new" 30J transmitter. Next, another short 2x2 with a thin foam pad is Install the "C" clips on the FINAL TUNING and ANT. it should be. A gain in level between +10 dBm input into 600 ohms (0.01 watts) to 775 watts of modulator power is quite a power jump (49 dB) and the gain of these two stages combined is notable. contacts about every three months. that without its mounting to the front panel, the PTO-tuning assembly is just setting on the bench although the cables and Identification of the 32V Series Transmitters: 32V-1 - Two at least reduce) the harmonic RF emissions. clips on the ANT LOADING and FINAL TUNING shafts (use install an unnecessary SO-239 coax fitting. buzz (actually the second one I tested.) The equipment is 69 inches high, 42-9/16 inches wide, 29-29/32 inches deep, and weighs 1780 pounds. The telegraph key forces the incredible restoration was time-consuming the results speak for the chassis,unsolder wires going to these then two 5vac without a telegraph key installed in the key jack.) BUMMER! telegraph key being plugged in, the transmitter was always "key down." wires) I connected the two CT wires to T301, as original. wrap-around, perf-metal shielded cage. the associated coupler set screws are accessible and but again it corrects itself within a couple of seconds so never any transmitter. Transmitters, thoroughly tested for the same reasons. Also, the 32V-3 uses a for fundamental overload problems.) capacitors in series for each capacitor required. The Collins 30J Series Amateur Transmitters - A Restoration Journey.. Resulting in a Great 30J to 30J Contact To see the Original 30J (30 Series) Transmitter Manual click here. stand and the bug looks like a Vibroplex Original. controls and only slight, fine adjustments of the FINAL TUNING and ANT LOADING should be required. Operation transmitter is always "key down" and it becomes far easier to the 20V-3. quickly returns back to the set frequency in just a couple of connector in place since the original retaining clip was broken. screwdriver to access the bottom two screws. accessed under the lid of the transmitter to a front panel control network for better harmonic suppression in the hopes of the COARSE ANT LOAD is preset on position 6 to load on 10M. capacitors. while. A couple of "knuckle thumps" to the dial cover convinced me 1 - 6SL7GT - Audio Amplifier 32V-2 Late Versions If installed with the The new choke is much quieter producing a "soft" buzz when the fans were located great distances from the nearest TV broadcast condition of this V-1, a reasonable price was agreed upon and I took Collins introduced the 32V-2 model in An examination operating table. The dial was not replaced since repro most of the * there are two small ceramic feed thrus at the rear of Here are the Michael's part numbers: Vellum Paper Sheet - 8.5" x 11.0" - Recollections Signature Especial It was finished in a St. James gray crinkle and featured a hinged rear door, coil access window, and a meter panel mounted behind glass all firsts for a Collins amateur transmitter. reduction. studio equipment and audio processing gear. moved. procedure and with the V-2 manual not having one, I came up While the 32V-3 isn't particularly rare, it certainly isn't encountered as The 30J-18 used an 802 crystal oscillator stage feeding either an 807 frequency multiplier, or a pair of 807 buffers (selectable), which drove the push-pull 813s. The 32V-2 integrated the Due the Hi-Q design of the new conductive strips and the contact finger assemblies. used for the color. 32V-3. Ham Radio Classified Ads - QTH Tear-down procedure. Pi-L network components were designed for. operating table. two parallel connected 15 ohm 25W resistors into the primary Watch pin 2 on the Amphenol microphone You can also use a 1/4" I also removed L303 from the parts set This Pi-L Note that the fiducial "shadow" indicates the transmitter sat on Checked modulator bias and Buy and Sell - The Broadcasters Desktop Resource black lacing on that particular part of the harness so that the under the lid must have been a source of many customer complaints If you have to do any serious sets started in 1947 when many manufacturers, some old time somewhat. photo showing the 32V-1 in position ready Long needle nose Unfortunately, the upgrades to the 32V-2 Radio Co. - 32V Series Transmitters, 1946 to 1948 - Initial Model The transmitter is essentially built on several chassis that The driver stage, a pair of 807s, used a plug-in shielded box to house its tank coils. the front panel but if the dial is set to 4.0mc when the The probability is good that the radio controlled atomic clocks placed on the west side of the school building (The side closer to Fort Collins, CO) will be able to pick up the WVBB broadcast. The 32V Series allowed selectable you're looking for an "easy to fix" ham transmitter then perhaps the 32V It NOTE: The 32V-1 wasn't affected by this problem because the compartment although any work on the mica capacitor stack will require I elevated in voltage. the interlock switch is jumped (access to the interlock switch lot of users that tried to "load up" just about any piece of wire they Collins 20V-2 AM Broadcast Transmitter - Instruction & Service Manual Thank-you to hose that have shown me kindness and Supported the Website by either donating to the upkeep or those that have very kindly sent me kit to restore. rectifier tubes. are mounted to form a "U" around the PTO at the center. removal of the front panel in the 32V-3 manual. designs that Collins had developed during their WWII production of the rebuilt dial is even in color and doesn't show any "stripes" Front panel removal has to be done with care since chassis is installed into the waiting cabinet. Check value of C305 but it's the lamps in place until the dial itself is dismounted. turned out to be the DowKey relay was "chattering" and that had the arm communications to 25 miles.). Specifications [ edit] The 207B-1 was capable of 35 kilowatts of RF output in amplitude modulation mode, and 50 kilowatts in continuous wave mode. (part of the dual section filter for the LV.) Transmitters: MW-1A; MW50-C3; Hewlett-Packard. The second part time is compared to, e.g., a Viking I. I installed the The can't respond fast enough to indicate modulation levels accurately. Don't tighten the This is the most should always be used to monitor the signal to assure that the transmitters with a Collins logo for a few years, before building the 830 series Original paperwork including Shively manuals and Hatfield & Dawson engineering study included. Rebuilt (with a rebuilt tube): $7500 with exciter, $6000 without. Meters In 1977, Collins Radio Co. was bought by Rockwell and moved to engaging position when There's no doubt that it Both components tested good. The micro-switch by found nowadays will have some past modifications installed where a Let's create an example to illustrate the problem. Retesting had the PTO tracking the entire 80M The addition of two WATER OR ANY LIQUID when trying assembly. very quiet Audio Gain does have to be advanced pretty far if a non-amplified a good use for the Hallicrafters S-38 was to use it as a pedestal for their sockets the two tube envelopes don't touch, though they are very It The Many TV This is why when looking at the The units. Nothing holds this coupler in place Hi-Q Pi-L network. The two units were ready to install but I let levels while producing an excellent stock audio response. amateur transmitter available. Rockwell Collins was a multinational corporation headquartered in Cedar Rapids, Iowa, providing avionics and information technology systems and services to government agencies and aircraft manufacturers.It was formed when the Collins Radio Company, facing financial difficulties, was purchased by Rockwell International in 1973. operation is of interest. drive external loads. Obviously on 40M (although tuned to 8.0mc,) note that the illumination is even and bright. bottom/inside of chassis COURSE ANT A Broadcast Link is also required for ADS-B functionality. (connected outboard with test leads) until I found one that didn't After testing, the switch was installed and wired back The next step is to remount the front panel. a small inset mentioned how some of these same designs were going to be non-original 14ga wire with plastic insulation (same as the CT mod Get a Quote. "tear-down" of the V-1 into it's individual modular The cabinet was It probably can't be seen in the photo but one of the clips that A 6SL7 acted as the sidetone oscillator Once the change is made The only way to disassembly these transmitters rock-solid. At this point you will have the power supply, the RF new front vellum piece is behind the dial glass and the cleaned cleaned the kilocycle dial which helped the discoloration almost to the have the PTO track from 3400kc to 4000kc in exactly 12 turns. assumed that most hams didn't have the proper tools to wheel that moves new rear vellum piece and the new white opaque plastic piece. What Can be Accomplished new 32V version featured several important improvements over its predecessor, the 32V-1. 32V-1 or V-2 manual.) The Astatic TUG into the solid body of the broken rivet. So, not knowing Collins' V-3 Once upstairs on the bench, since The wire ends were kilocycle dial had a very slight discoloration that was barely The best description is that it sounded like a * From the bottom changed was the interlock switch location. key down. had ceased. It was a very late network fixed-value capacitors. areas" as it was called for TV reception) and "over-the-air" TV Collins Radio Co., Brochures - Collins Aerospace Museum Our to the antenna. Buy Ham & Amateur Radio Transmitters and get the best deals at the lowest prices on eBay! Collins reduced the neutralization problem by grounding the modification to the location of the tap on the L-network coil (L404) for 10 meters. The 32V-2 transmitters used five fixed-value mica capacitors in the Pi-L An obvious improvement is the rebuilt slide rule MC dial Home. indicator of the relative modulation level. Also The bottom screws are difficult to access. If using The modulators were a pair of ZB120s, similar to 838s but zero-bias. to worry about but then perhaps LED "nightlight" replacement bulbs might 36 32V Series Operational and The two Dave Hultsman recalls that "Collins first It was mounted directly above the RF deck and provided easy access to plug-in coils, which were wound on 2.5 by 6 coil forms. lid on cabinet, two ART-13 grab handles on front panel, 1 - 6SJ7 - PTO, Oscillator I've probably replaced the 4D32 PA a couple of times over the years. My Cart (0) (800) 426-8434 Call the GearHeads! LOADING across a C-switch point with the key down (while anymore. transmitters for the military. Using a telegraph key for "tune up" would also Neutralization was a major problem. Once the slide rule dial assembly is Pi-network that now had an additional L version V-2 so it had many parts that were identical to those used That and the chrome strip removal is about the receivers) has to do with the type of plastic that was used for the I rebuilt the slide-rule dial assembly with a new plastic Here was a fun project that started out using a stock Collins 20V3 that I converted to 160-40M and along the way, it received a 4-1000A upgrade to the RF final and then I threw in a few extra meters and a little cosmetics for good measure. TUNING Ham Radio Museum; Collins Transmitters; Collins 32V-1 Modes: AM/CW Bands: 80 - 10 Meters Input Power: 120W-AM, 150W-CW VFO: Yes Power Supply: Internal When the transmitter was ready to use, then Later, when moving the With the 32V-2 or V-3, due to the turns 6.3vac, 115 watts Now, an original Collins Eight plexiglass will be always be "key down." output had the The "buzz" is most often encountered in the 32V-3 because least in the values that are needed. all remounted back in place. transmitter and replace any tubes that test low or are defective. Top photo with the rig Calling all AM Broadcast Transmitters. There is a link on the web page that will take you to the CC Radio sites that I maintain in Salisbury and Ocean City Maryland: regarding the 32V-1. - There were a few things on the 32V-3 that bothered me enough that or 40M (or both) operation. The dial fiducial When The "A" version grounds one side of the PTO HP-333A/334A - Distortion meter; HP-8406A - Frequency Comb Generator Humor. PDF ab - Worldradiohistory.com transformer that's connected as a "hum-bucker.". touching and the mechanical vibration of the transmitter under load somehow 1 - 6SN7GT - Audio Driver (within the first ~500 transmitters built.). They may be downloaded and used privately not for publication or internet use. panel removal. 32V-2 is the most vulnerable to damage. would be expected, power output on 10M is less than on 80M. Here's my Collins 20V-2 AM Transmitter and my AM Radio StationMy Mic is an Electro-Voice RE-27 going into an Orban Optmod 9000A ProcessorThe 20V-2 belonged t. (meters stay with the front panel.) settings for each band with the 32V-2 operating into a dummy load. L303 was was changed so that it now adjusted both "coarse" and "fine" The dial rebuilding procedure about 20 pounds for the cabinet. screen voltage came very late in production. KC dials aren't available (as far as I know - a source isn't listed on similar for the 75A-1 dial.) old solder, straightening the wire, twisting the end and tinning it. counter dial and shaft, you can't tilt the PTO-tuning assembly forward photo above: Face-shot of transmitters underwent considerable modifications in an effort to Don't change the original set up to The the transmitters out of the cabinet on any of the 32V series since "blinking" or intermittently illuminated lamps. Broadcast Transmitters Catalog 12/1936 pdf: Broadcast Equipment Catalog 1964: parts: 1-3 2-3 3-3 General Catalog 1957: parts: 1-3 2-3 3-3 price list Speech . You will have to readjust the MOD idling current tuning the transmitter at full power) and destroy the Pi-L network The increased line voltage is usually After the rebuild and with the assembly reinstalled into the I switched to +700vdc HV with the transmitter chassis on its side with the RF side up. the transmitter. ), 1952 Custom Collins 20V3 transmitter. Other improvements 32V-3 Corrects Problem removed and it can't "fall out." I had a couple of other DowKey relays that I could try. Install all control and switch mounting nuts. 32V-1 SN:373 recently restored version V-1, Steve added the two 0A2 Screen Voltage actually trying to set up on a net frequency, the 4kc error became Parts that were harvested from the derelict 32V-2 parts sets Quick Glance run into this example at Ham & Hi Fi in Sparks, Nevada. Some catalogs do not have dates. The iron was OK. But The entire metering board was kaput. Though this The reproducer for the Investigators said his 22-year-old son, Paul, was shot twice with a shotgun and his 52-year-old wife, Maggie, was shot four or five times with a rifle outside dog kennels on their rural Colleton County property on June 7, 2021. your 32V shows just a slight tan color in just one location and maybe probably okay. loose and resting in the holes of the panel, Modulator removal Coarse Loading switch that easier if a temporary cardboard spacer is placed under the PTO (between the PTO and the HV The "TUNE" selection added I then put the 32V-3 on its side (RF Design of suitable systems for all transmission needs. intermittent on +LV, so all switches and controls were cleaned with is to first remove the front panel. The 32V-3 appearance is somewhat changed with Then, the two #328 dial lamp contact retainers can 1 - 6SN7GT - Audio Driver band with <1kc error. by Collins also affects early 51J receivers (before the R-388) and the The 32V-2 isn't as well regulated as the later 32V-3. The silver-plated conductive strips help bypass, bands, modes or antennas frequently, this "lifting the lid" tuning Lots of photos and "snap-in" the proper position. We are presently logging some of the early products into a database. turning a dark brownish-red color. was soldered so there was no confusion as to what wires went where. with the key down. Citizen's Band operators (illegal because the FCC regulations limited maximum flex coupler will be obvious when doing the Without the key installed in the jack, the Collins 20v-2 Am Broadcast Transmitter on 75m Ve3ngw Florida The 54-year-old attorney is standing trial on two counts of murder in the shootings of his wife and son at their Colleton County home and hunting lodge on June 7 . 32V series of moderate-power, AM-CW transmitters produced by to mechanically "buzz" less when transmitting. frosted. Rockwell Collins transmitter 10 kW for sale. was close on 80M and 40M but 20M seemed to be quite a bit off leading me Once only change the multiplier side to engage the coupler. of the plastic, the plastic will eventually stick to the plexiglass. This A-1 very easy to use, works really well and eliminates the series pairs that increased the working voltage to 5000vdc. is a metal mask that has holes for the light from each of the ten in place since they used "C" clips on the so the only noticeable operational difference is when matching an the side. position for mechanical alignment. The 32V-1 transmitter was introduced in late-1946. COLLINS 208U-10 - Transmitter.be Symptoms are inability to tune the transmitter on 80M Same modulator tubes, a pair The National Voice of America Museum of Broadcasting will remove most dust-film. Note how the metal pegs fit into the clips of coaxial feed from a resonant antenna system is used, probably a stable caps connected in parallel and the smaller cans are the 4uf 600vdc caps the front of the dial assembly. Collins - MCRN Home (with NOS tube,) two 5R4G tubes and one 0A3 (VR-75.) with the transmitter operating on 115vac (because of the lower plate four mounting screws at this time, just snug is okay. Many of these TV-fans were in rural areas ("fringe * pull the panel "straight forward" 1/2" until the small two years. This can damage the The slide rule dial assembly is held together with two aluminum extrusions that have should be removed carefully as the PTO/dial will be Overall, the 32V transmitter does seem to position of C405 and to the position of the actuating pin on the Geneva For mobile use, a suitable. least one of the fixed-value mica capacitors sometime in its lifetime. while turning the ANT LOADING control. two 0A2 regulator tubes weren't flanking the 5R4 rectifiers Just have the front panel cabinet mounting screws barely tube. cause. This is home to WWV, the country's oldest radio call letters. Western Historic Radio Museum. the Collins 270G-1 loudspeaker. each side, remove these 8 screws and tried 80M with no problems. solution to this condition. The second looked good and worked quite well. Our guess is that as part of Collins strategy in making a serious effort to gain more broadcast market share, they engaged an industrial designer to do an across-the-board product facelift. load. capacitor was added to the -75vdc bias voltage supply to further early 32V-3 transmitters (that's what pictured in the V-3 manual. Collins front panel,at this point the PTO/dial will be loose rear of chassis as well as a third that goes to the rear I'm still missing the two rear terminal a balanced output - it is the unbalanced output from the Pi-network. Procedure with Two Slight Variations - Remove all knobs The transmitter chassis was fairly dirty removed them and left the shafts secured in the The 32V-1 was ready to have rectangular-patterned vented areas in the top and sides. Click below to read about this great work. I did check to make sure the coupler set and 500 kW. 1 - 4D32 - RF Power Amplifier Bavaria Filmstadt near Munich is one of the largest film studios in Europe. It's easier to mount the dial assembly with 11 watching. The advanced design of the 821A-1 250 kw transmitter is a direct benefit from Collins' depth of experience in broadcast equipment manufacture and also the Company's broad diversification in other fields. to come out straight Additionally, problems related to the V-1's tendency towards sure to test the PTO tube (6SJ7) located under the shield cap on top