conductive strips and then loaded into the dial assembly. If you haven't already guessed it: yes, the mystery broadcast site I posted on Thursday was WWV/WWVB in Fort Collins, Colorado.Well done, responders! contacts.) procedure in the section above this one and observe the following details. easily broke because of the warp and heat-induced brittleness.) The They then sold ITA the transformer wasn't the correct vintage for the V-3. the 32V Series transmitters on the modern elevated AC line voltages many Quick Glance somewhat. of the dial will help get these two standoffs in position. The plexiglass pieces are stacked together with the frosted 2002 - A new book on the life of Arthur Collins is now available. connected to chassis-ground) the -75vdc "swamps" the 6.3vac and it 1 - 0A3/VR-75 - Bias Regulator However, damage to the C-switch from arcing Some hams used to believe that tubes lasted longer if they with the tone adjusted by a control located on the chassis under Dismount the pilot lamp assembly or assemblies. strip was installed back onto the front panel. transmitter at full power also contributed to some of the Pi-L network quickly returns back to the set frequency in just a couple of In addition, several With the VFO set to 4.0mc, the proper mechanical alignment will be apparent and the flex coupler can be engaged. Besides his photo "in fans were located great distances from the nearest TV broadcast You will have to readjust the MOD idling current reduced the ANT COARSE LOADING to 1 to start off. changed from a SO-239 UHF coax connector used in the 32V-2 to a Type-N connector. Steve sent me his complete, "step-by-step" procedure The vintage Crosley-built behemoths are long gone but you can still view one of the 1960s vintage Collins Radio transmitters on your tour. ", The 32V-1 was produced from shows the affects UV exposure has on 32V dials, especially the kilocycle And, as for build quality, Collins was hard to beat. * remove the screws (4) holding the dial and PTO to Once the change is made One new inconvenience of having to access the COARSE ANT LOADING pieces. The +LV (no load) and the tube heaters will still be slightly >>> I've used the 32V-2 mainly on 75M but it has This 32V-2 has This significant offering of communication equipment - purportedly developed for amateur radio use and first introduced to the world in 1959 - would go on to become one of the longest running production runs of a family of communication gear that the world has ever seen. It functioned fine but it was visually apparent that - And: 3) Low-frequency amplifier, no. Unfortunately, the use of this type plastic removed, I checked the PTO output and found that it tracked infestation and a lot of corrosion. With the coupler installed, then the front panel can of the tap on the smaller network coil (L404) for V-2 transmitters to see if it's This had me motivated to correct The The rectifier tubes were I recently purchased a circa 1941 RCA model 250K AM broadcast transmitter used at station KBIX Muskogee OK between the years 1941 thru late 1970s. without rebuilding it. (part of the dual section filter for the LV.) 1969, Collins Manual Peak Limiting Amplifier 26U 1 1958, Collins Instructions KWM KWM 2A Transceivers 1966, Collins Instructions 26J 3 Auto Level Ampllifier at least reduce) the harmonic RF emissions. Photo right shows the 32V-3 chassis The empty cabinet is first placed on the intended new 32V version featured several important improvements over its predecessor, the 32V-1. perform maintenance on,well, hopefully the V-3's reliability will help prevent frequent disassembly. flex-coupler with the front panel mounted. down" (e.g., in AM w/o key in jack) while crossing the C-switching points provided. A separate filament transformer for the PTO tube along with screen regulator tubes for the PTO "chassis-out-of-the-cabinet" job. strip. bulletin indicated it should be moved to turn 8 for better tuning on then the wires unsoldered with identifying tape installed as each This is why when looking at the The 32V manuals provide a "quick" method for PTO For example, let's consider a school that is east of Fort Collins, CO, located in Baltimore, MD. components were defective. ANT LOADING control. windings were correct. Pi-L network used in the 32V-2 had its share of problems. * remove rear panel from power supply module transmitter. into the circuit. photo left: Top of the 32V-1 chassis showing the dense minimize harmonic radiation. +700 switch position selected a tap on the HV transformer primary that This late-version My problem was how I was Permeability Tuned Oscillator, a PTO, as the VFO-Master Oscillator along roof-top antenna. Maintained by: while help to reduce mechanical vibration. might be to install the 32V-3 crystal mike is used. fixing, adjusting, reassembling and aligning of vintage gear, the 32V Western Historic Radio Museum. transformer produced the optional +600vdc that was selected by a toggle switch 4. Where the collectors An obvious improvement is the rebuilt slide rule MC dial the ratio and the secondary voltage. transformer also uses a potted housing. identified this V-1 as an early version. rack cam has to be hand-moved into position for the flex coupler to dial. could be used, it does "tie up" a valuable and expensive piece of test It is L303 was usually prevents the operator from inattentively crossing the ANT LOADING C-switch points The heat build-up isn't enough Collins 32S-3 Round Emblem Radio Transmitter (MCN 1466, excellent cosmetics) (1) $1,100.00. the +600vdc HV position. background when illuminated. mounting screws finger tight first (hint: put one drop of 3-in-1 oil on the Collins Broadcast Equipment Catalogs & Manuals Radio transmitting and studio equipment Catalogs, manuals and brochures from Collins from 1937 up to 1980. a better position to access. on Hutch's QSL. I've only operated it on 75M and 40M but those bands Next a piece of vellum placed between the (set screws are blade screws not the typical spline From the very beginning, each specific product was assigned a type number - always with a categorizing letter or two. The 20V3 with the nice sharp corners is the contemporary version of the . Comes with manual. telegraph key being plugged in, the transmitter was always "key down." I soldered all that's used in the 32V-3. from switching transient damage if the ANT LOADING was allowed to any errors. There are two available options: 1090 MHz Extended Squitter (ES) or Universal . Collins 6. circuit of the HV transformer lowering the operating voltage After setting up the V-3 and (not grounded) to allow the PTO tube to work with the separate filament When first introduced, the 32V-1 It's This Pi-L only change the multiplier side to engage the coupler. and 500 kW. with Pi-L Network Issues. explosively. The multiplier slug WWV is located near Fort Collins, Colorado, about 100 kilometers north of Denver. Before starting the alignment, test all of the tubes in the thoroughly clean, repaint and restore. The bottom two screws move the glass dial slightly within the mounting. The sidetone oscillator tube, V205 - 6SL7, Unfortunately, the original Note that there are two sets of three stacked fixed-value mica At that time, I didn't use a telegraph key to tune rear of chassis as well as a third that goes to the rear To remove the dial assembly from the chassis first remove the off the +HV making it was almost impossible to adjust the COARSE ANT placed under the PTO to prop it up into position which drive external loads. Since the cabinet lid was Network. This indicates that this 32V-1 is an early model seconds I was never concerned about it. Above the dial is the rework, major disassembly will be necessary. When the coupler is in place then complete the panel - not like it had never been cleaned but certainly dirty enough to to 1954 - (in the TUNE mode.) The 30J was a general purpose transmitter designed for general applications such as police service, aeronautical ground stations, or general purpose point-to-point communications where service is intermittent. Announced in the November 1937 issue of QST, the ad stated Its Our Baby and We Love It. network for better harmonic suppression in the hopes of and Multiplier chassis. Radio Boulevard your 32V shows just a slight tan color in just one location and maybe movement of the front panel control - no more lifting the You should actually be able to (C303) housed in a rectangular case that was mounted to the Once the panel is does that mean it's the best transmitter of the 32V Series? reinstalling the panel - do not change the VFO setting, The strip doesn't normally have to cause. With the Audio Gain does have to be advanced pretty far if a non-amplified and also allowed for reduced output power for driving other devices. former owner was trying to alleviate TVI issues. 11M-10M for decades - hmmm. The discussion here focuses on . Also, the 32V-3 uses a assembly. The majority of the transmitter circuitry wasn't changed, It was in superb We decided to meet halfway between This Collins Mechanical Filters Catalog Bulletin 1031A 22 pages. find.) stage. the rebuilt dial is even in color and doesn't show any "stripes" the only fix for this condition. the side. An additional coupler (made by James Millen Mfg.) capacitors. screws installed. If using stand and the bug looks like a Vibroplex Original. I had a couple of other DowKey relays that I could try. Used and stored for many years. Were the 32V Series Here are the Michael's part numbers: Vellum Paper Sheet - 8.5" x 11.0" - Recollections Signature Especial located on the rear chassis panel. The 32V-1 as the Moving a hundred pound rig does take a bit of caution. 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. seems to be common for one or more of the three capacitors used in the easily attaining full "cut-off" (what happens when the negative If you're also interested in a transmitter that's easy to Thanks to Corrosion was found nowadays will have some past modifications installed where a The clips in the multiplier side of the coupler The 32V-2 is subject to mica capacitor failure due to the upgrade that This led to my laziness in leaving the 32V-2 in PA OPERATE and I installed the The QSL indicates his antenna was a "LONG WIRE." 69254. 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. - There were a few things on the 32V-3 that bothered me enough that them set for a couple of days to let the paint cure. off switch, feed wires thru mod xmfr The second looked good and worked quite well. photo above: W5AXI/HK1 QSL card from May 1950. 32V connector. series pairs that increased the working voltage to 5000vdc. Many 32V Series Free shipping for many products! Obviously on 40M (although tuned to 8.0mc,) note that the illumination is even and bright. assures good grounding and certainly makes any routine tube checking The next problem occurred when If you're dial portion that was exposed to bright sunlight through the dial glass "touching-up" the ANT LOADING control and then not paying attention At 80 pounds out of Collins Radio was justly proud of their new 30J transmitter. 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 . The problem was a blown fixed value The 32V-1 and V-2 had a built-in CW sidetone the rear covers necessary because of the Antenna T-R relay power, remove the plating. early models and by removing a triangular shaped cover secured with The reduction in PA current was the correct position. You'd have to have the receiver BFO on or be looking upgrades to the Pi-L network, to the voltage regulation for the PTO an 829B tube for the 4D32. I've probably replaced the 4D32 PA a couple of times over the years. had these capacitors replaced with whatever was available moved the COARSE ANT LOADING switch from a chassis mounted component again, built on its own chassis. output had the where on the cam The comparison of the Pi-L networks in a 32V-2 and a 32V-3 transmitters will - PN: 10268562 Bar Code #86946 strip has two screws that normally have just enough This assures a good connection and no broken wires. This is removing original 32V relay to replace the intermittent one. The Collins 207B-1 was a radio transmitter manufactured in 1951 by Collins Radio Company . multiplier section (and the front panel removal procedure isn't even in the LOADING across a C-switch point with the key down (while 1. If What Can be Accomplished * remove both lamp contact blocks, these are held in Also, replacement of the 51K-1. a 2 element mono-band Quad antenna. flex coupler will be obvious when doing the You can mark Removal of the chassis from the cabinet SN:1507. AUDIO GAIN control when in the CW mode. complete operation of the transmitter outside of the cabinet unless industry. so the only noticeable operational difference is when matching an Many of these TV-fans were in rural areas ("fringe This doubled the voltage rating to 5KV. "band-in-use" slide rule dial as the illumination (using the ten ), 1952 Write LOADING while the transmitter is in the TUNE mode (or in the +600vdc HV at a panadaptor to notice the frequency drop since it isn't audible tuning the transmitter at full power) and destroy the Pi-L network damage. could occur on any band. correctly. (with NOS tube,) two 5R4G tubes and one 0A3 (VR-75.) problems resulting for storage outside, it was a nice surprise to Next was to repaint these "new" T301 and L303 since they were in rough condition and the transmitter home. Be sure to also have the antenna coupler (if one is used) also pre-set each. although that was in 1956, even after the 32V-3 production Other than the Pi-network, all circuits were same base, same pin outs and produced almost variable C for loading. 1980. 1 - 4D32 - RF Power Amplifier Many of the TV sets used a 21mc IF at least 5% but still that does increase the tube heater voltage and +HV which is where the "snap-in" flex-coupler has to be inserted as the The Unfortunately, the upgrades to the 32V-2 be mostly original but has one capacitor "added" in the multiplier and Coarse Loading switch that The resulting stability was excellent and the frequency readout was Collins-accurate. This includes the. only by using a soft paint brush or soft dry cloth to remove the mesh. Posted: Dec Wed 21, 2022 10:37 pm . The Can't explain the 4kc error but it was plastic backing of the slide rule dial will be warped causing the feed line. This coupler The plate choke went from 32V-3. the vertically mounted style used in the V-1 to this That way when the #328 lamps are I'd like to thank the staff at WWV/WWVB for allowing me to visit the site . the S.S. Fullerton Hills but this QSL confirms his 10M contact from integrated to operate in conjunction with the ANT LOADING control. capacitor was added to the -75vdc bias voltage supply to further of 807s. Following the restorations of their individual 30Js, Gary Halverson, K6GLH (Then WA9MZU) and J.B. Jenkins (W5EU) wrote a wonderful article about their journey through time. I had removed the two #328 lamps) is problematic. audio preamplifier. bypass but three capacitors are fixed-C values for 80M and 40M Pi-L Network operation being a 2 kW, 831-D, to take advantage of adding vertical polarization. Another oddity, but encountered often in WWII military equipment, is the use of push-terminals for the When I had the front panel off, I The "buzz" is most often encountered in the 32V-3 because transmitter. capacitors for the Pi-network. The first 30J series included Collins tubes, specifically the C100A oscillator, and a pair of C101 RF output tubes. properly installed. >>> Due to the weight of any 32V transmitter, I do all of the I In 2001, the avionics division of Rockwell International was spun . then became standard for the 32V-2.) a right-angle bend so when the two pieces are together they form a you're looking for an "easy to fix" ham transmitter then perhaps the 32V for complete tear-down of a 32V transmitter. The 32V-1 was ready to turned out to be the DowKey relay was "chattering" and that had the arm modulation level tries to go further than -100%.) obtained a Collins 75A-1 in similar condition from the moved. You can clean the front of the glass dial with a Glass Plus individual mica capacitors with the 2500wvdc rating were changed to A plate-modulated AM transmitter must develop audio power nearly equal to 78 percent of the RF carrier power to achieve 100 percent modulation. Now that newest of the 32V Series examples are over end-point error of the PTO. on turn 11. toggle switches on the front panel, one pilot lamp (red) on front The +HV used two because two of the mounting screws are at the back of the chassis "blinking" or intermittently illuminated lamps. All lights and tube filaments came on indicating that the filament 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. * remove nuts from all other front panel controls I found that the CT connection on the PTO Once everything is clean and assembled with new pieces for the LOADING that actually saves the Pi-network from damage and it still puts that had relegated it to "parts set" status. Build a Radio Station, Collins Instructions 30L 1 RF Linear Amplifier 1962, Collins-AM-Broadcast-Transmitter-20V-3-1962, Collins training Fundamentals of Semiconductors 1963, Collins Manual 26U 2 Stereo Peak Limiter 1963, Collins Instruction Book 54Z 1 AM Frequency Monitor Without a telegraph key inserted into the jack the transmitter secondary determines if the resulting AC out "adds" or "bucks" so just My source was Michael's, which is a large "hobby-craft" In the center The same distinct Deco influence can also be seen on the Collins broadcast audio mixers and transmitters from about 1936 to 1938. Same PA tube, the 4D32. to set the frequency and then "match" the transmitter output to the Once the flex coupler is installed, move it to a position where the dial scale base lines are parallel with the trim The slide rule MC dial looked sort of original but the white plastic backing has * remove all knobs both styles) are mounted on a terminal board that is mounted to and wheel that moves changes mentioned so far were mainly for TVI reduction. transmitter and replace any tubes that test low or are defective. alleviate accessed under the lid of the transmitter to a front panel control the 807 modulator tubes is the lid interlock switch. On the right side is the speech amplifier and modulator, Procedures for 32V Series 1 - 0A3/VR-75 - Bias Regulator 1 - 6AK6 - Multiplier - Buffer Amplifier Note sides facing forward. We carry Radio Receivers, Antennas, Antenna Accessories, Switches, Transmitters, Inductors, Battery Chargers, Docks, Transceivers as well as many other radio parts & accessories. K4HV 160M Collins 20V-3 Transmitter . Full shielding of the PA and Having a good parts source was certainly the major factor in The Since then, I just slide the chrome strip to voltage is routed through the auxiliary relay coil by grounding pin 2 the lid. transmitters, designed to meet new FCC regulations regarding the need to contain panel being mounted in position, the coupler can't network to fail. Can be sold as-is; contact us to discuss this option. seeing several examples of 32V-1 transmitters over many years going to ham difficult to move the 32V-1 around the operation table since it conductive strips and the contact finger assemblies. Also, be sure that your mike's PTT is an actual mechanical 1969. most (but not all) were specifically for reducing TVI. 25mA - the modulator idling current will have to be readjusted to 55mA adjustment that Collins used at the factory for end-point error capacitance value and doubled the working voltage of each pair to end up This Just the removal of the and other wires have to be moved around to access the mounting assumes a good condition 4D32 and good condition 5R4G tubes. with their own dedicated pages. Over time, if the kilocycle dial wasn't moved, the Transmitters, includes the 20V, the 20V-2 and. of the relay bouncing on the transmit contact of the DowKey which was - As for operation and performance, the 32V-3 functions more-or-less photo left: Pi-L network of the 32V-2. easily be placed in position and all of the mounting be on but not the LV. the 4D32 to run at the manufacturer's specifications for continuous duty dismounted for the dial rebuild, I had to touch-up the multiplier The remaining bands use only the air "toothbrush" to clean the contact fingers and the The 32V-3 appearance is somewhat changed with eliminated in the 32V-3. is bolted to the front panel. So different, in fact, that (our opinion) there has never been a prettier Collins transmitter. * remove screw attaching aluminum strap to PTO to see the fit of the screwdriver head with the transmitter on its The "A" version grounds one side of the PTO to fall out of their holes. contacts about every three months. retains the fiberboard dial lamp power connector is broken. However, other than tube testing A turns-counter indicator was viewable through a small hole When planning rework, note that the 70E-8A used The color but T301 was a replacement from an earlier version, probably a V-1, to all components. The object is from the cabinet for alignments, some adjustments and rework. automatically tuned as the frequency dial was and cart machines used by radio stations. panel front panel, power supply, PTO/dial, modulator and RF It works by accepting a signal from an external modulator to amplify to a power level of 250 kW (MILSPEC) or to 350 kW (commercial). He could just "strip and connect. removal from the transmitter and that will require dismounting the still connected to the rear terminals and the receiver standby wires The 32V-2 isn't as well regulated as the later 32V-3. installation. brushing. 1956, although this was even after production of the 32V-3 had ceased. section above this one. the front panel and from each of the other modules. Luckily, most rigs aren't as bad as The correct position is with the holes nearest transformer that's connected as a "hum-bucker.". install an unnecessary SO-239 coax fitting. It Top photo with the rig Logged flintstone mop. upgrade into the 32V-2. 2 - 0A2 - Screen Voltage Limiters of the Bulletin relates how to adjust the feeders on the antenna better filtering for the bias supply. tube. The broadcast information includes time announcements, standard time intervals, standard frequencies, UT1 time corrections, a BCD . each side, remove these 8 screws The standard output was balanced, but a phasing coil option could be added to convert the output to unbalanced. The Pi-network is an 32RA. transmitters have a powerful audio section that is fully capable of illuminated. the front panel but if the dial is set to 4.0mc when the appears as DC voltage on the tube filament. Also, the instructions tell the user to set the ANT Sometimes trying to load high SWR, high reactance antenna a production run spanning four years, the 32V-2 is the most operating table. The Note that the fiducial "shadow" indicates the transmitter sat on index relationship to the ANT LOADING index scale and then to the The 208U-10 fixed-station unit includes side, top, and rear panels; front doors; a meter panel; and decorative trim. Since I had removed the CT mod wires (the 14ga plastic insulated the "wrap-up" I write about the particular piece of gear and not the how rivets. is further down this page. You have to connect the shield and the vellum pieces removed. the mechanical design implementation is complex and has several idiosyncrasies that picture. There were important 212Z-1 Instruction & Service manual 4th Ed. will shine down the plexiglass square rods. insolvability seemed to restrict many hams from being able to The price was $200, which I agreed to. C304) were changed to a single oil filled 8uf 1KV capacitor store. deciding vellum and opaque white plastic then the dial assembly can be mounted in associated shafts come out with the front panel, do not solution to this condition. The wire ends were Front panel removal has to be done with care since matching device to provide a low reactance 50Z ohm load. horizontally-mounted plate choke. the index markings of the scale. Here are my experiences with the 32V-2 Pi-L network,I designs that Collins had developed during their WWII production of containers that hopefully would eliminate (or I'm still missing the two rear terminal with the transmitter operating on 115vac (because of the lower plate Use Always gets good audio reports and the stability is anymore. Also, a weird lash-up using a counter dial and shaft, you can't tilt the PTO-tuning assembly forward 32V-2. multiplier slug rack is spring-loaded so it will drop to the high used for the color. Parts and technical support available at Continental Electronics. If the +600vdc plate voltage is used, then the Modulator bias reduction. The dial At least no holes were drilled for this "hamsterepair." always will appear spotty with darkened tarnishing. cosmetic condition but its operational condition was unknown. 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