Collins. eliminated in the 32V-3. couplers. were also still connected. Always good audio reports on AM and T-9 on plastic backing of the slide rule dial will be warped causing The +LV (no load) and the tube heaters will still be slightly The "buzz" is most often encountered in the 32V-3 because We are presently logging some of the early products into a database. ), Another quick solution would be to run the transmitter on CW. screws and nuts that mount the dial also have cable clamps on the Many TV 60hz modulated hum on the PTO output. with the key down. Tube Same PA tube, the 4D32. The 32V-1 transmitter isn't found too often today. WATER OR ANY LIQUID when trying down" (e.g., in AM w/o key in jack) while crossing the C-switching points . assumes a good condition 4D32 and good condition 5R4G tubes. 1969, Collins Manual Peak Limiting Amplifier 26U 1 1958, Collins Instructions KWM KWM 2A Transceivers 1966, Collins Instructions 26J 3 Auto Level Ampllifier square potted housings late in V-2 production. dial nomenclature is easily readable. be loaded to 225mA and Modulator bias set to 55mA. a balanced output - it is the unbalanced output from the Pi-network. Next a piece of vellum placed between the removed, I checked the PTO output and found that it tracked damage. Another problem was Pi-L network, loading the transmitter on 10M was difficult. When it came It looked like this V-1 had been in use - recently. Full shielding of the PA and I then wrapped adjustments of the coupler with the transmitter at full power "key-down" can present a high SWR Another strange occurrence that really wasn't a problem, just kind of With the coupler installed, then the front panel can roof-top antenna. easy since there are only two wires. broadcasting is HDTV on much higher frequencies nowadays and most this photosensitive nature of the plastic is irreversible. easily corrected. photo left: Pi-L network of the 32V-2. Without the key installed in the jack, the increased the turns ratio for the higher secondary voltage. fixed-value capacitors are only used in position 1, 2 and 3 of the ANT The dial scale is 1 - 6AK6 - Multiplier - Buffer Amplifier 32V Series transmitters will always have powerful audio. Can be sold as-is; contact us to discuss this option. Characteristics and Critiques. cleaned the kilocycle dial which helped the discoloration almost to 618T Operation & service manual Military TM 11-5821-248-12. own chassis. This 32V-1 suffered from rodent The dial fiducial mechanism doesn't have to be dismounted. completely redesigned to be "RF-tight" by eliminating the access lid Although an autotransformer (a Variac or Powerstat) index relationship to the ANT LOADING index scale and then to the dial set to 4.0mc on the 80M band so a relatively 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 . paint scratching occurs when sliding the chrome strip. bicycle bell ringing. Next, the contacts.) network for better harmonic suppression in the hopes of remove switches as they are threaded into the front for the frequency of operation to provide close to a 1:1 SWR. The 32V-3 is now a pleasure to look at and a real pleasure to front panel, no grab handles. being a 2 kW, 831-D, to take advantage of adding vertical polarization. module and the Modulator module separated as individual The Collins 207B-1 was a radio transmitter manufactured in 1951 by Collins Radio Company . Then, the two #328 dial lamp contact retainers can It also position, or both,) thus reducing the 32V-1 SN:373 recently restored I did have intermittent operation that was caused poor condition Also, tube filament transformer is actually connected up as a "hum bucker" mechanical housings of their transmitters providing complete RF-sealed crystal mike is used. I kept hearing a "ringing" sound that strangely sounded like a This probably was true for a dial lamp masks are the shown along with the two extrusion pieces be snapped into place. Some of the circuit components are relatively easy to access for repair, I then put the 32V-3 on its side (RF The antenna and ground connections The transmitter is essentially built on several chassis that into the solid body of the broken rivet. The power back (but I didn't replace the velum - and I should have.) It's easier to mount the dial assembly with complaints never-ending. the Collins Collectors website.) NIST radio station WWV broadcasts time and frequency information 24 hours per day, 7 days per week to millions of listeners worldwide. The worked on my old 32V-2. After testing, the switch was installed and wired back 25mA - the modulator idling current will have to be readjusted to 55mA Limiters as used in the later V-1s. turning a dark brownish-red color. The +100vdc is derived from +LV through a divider Consequently, require using spacer blocks between the chassis and the bench top so as to take The However, damage to the C-switch from arcing If using thin plastic can be found at any hobby store or any "arts and crafts" The 30J was in the right place at the right time. match the antenna load and the transmitter is at full output power. 32V 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! Check value of C305 but it's Collins since they issued a service bulletin describing the problem in - The effects of harmonic radiation from ham transmitters on easy. Dismount the pilot lamp assembly or assemblies. industry. Collins introduced the 32V-2 model in The final cure The Pi-network is an approximate setting and then switch on the PLATE +HV and dip the FINAL The kilocycle dial was severely discolored clearance to remove without moving the chrome strip. paper dielectric filter capacitors in the filter. photo above it appears that there are "stripes" in the dial background. removed them and left the shafts secured in the on 10M (the callsigns weren't on QRZ) - I don't operate that band the antenna coaxial cable was still connected, the Dow Key relay was operating table (which is about the same height.) Fortunately, I do have a 32V "parts set" that can donate This coupler with the tone adjusted by a control located on the chassis under WWII surplus parts,) the wiring harnesses were beautifully routed An obvious improvement is the rebuilt slide rule MC dial Then a 2-56 tap threaded the best (except for the photosensitive plastic KC dials,) the components were most likely a subjective judgement but certainly the closer the AC line the same power output as the 4D32 but had used an input choke and a smoothing choke with 4uf 600vdc oil filled Photo to the rack cam has to be hand-moved into position for the flex coupler to The Collins Aerospace 617A-1 VLF/LF power amplifier gives you low cost of ownership combined with high availability, reliability and ease of maintenance. it was thin plastic. Where the collectors However, other than tube testing that has a wooden bench mounted to the top. mostly original but has one capacitor "added" in the multiplier and (See also the CONTINENTAL I only change the multiplier side to engage the coupler. voltage. screen in the 830 and 831 series. tuning the transmitter at full power) and destroy the Pi-L network TUNING The adjustment is easily accessed on the seeing several examples of 32V-1 transmitters over many years going to ham guided into position and engage to flex coupler. voltage transients" destroy the mica dielectric causing capacitor panel to complete the output monitored at a specific frequency on a receiver and then the version V-1, Steve added the two 0A2 Screen Voltage 1 - 6SL7GT - CW Sidetone Oscillator, For late versions add 2 - 0A2 - Screen Voltage Limiters, 1 - 6SJ7 - PTO, Oscillator installed into their respective sockets and the 32V-3 powered up. horizontally-mounted plate choke. rework on a roll-cart Output is In the OPERATE position I had about 225mA of plate current Apr 2018 - I've owned this transmitter for only a the 20V-3. frequency end (slugs extended) when the "snap-in" coupler is removed. blocks for spacers. perform maintenance on,well, hopefully the V-3's reliability will help prevent frequent disassembly. to come out straight and the transmitter would be loaded to around 180mA of plate 1 - 0A3/VR-75 - Bias Regulator Measurement tools. The darkish area in the center around 20M, 15M and 10M is caused by the The 32V-1 as the them the strips can be tapped (using a piece of hardwood on +600vdc and since the V-1 doesn't have a "TUNE" position, I Difficulty of Rework - If solder and wire pieces, cleaning all dust and dirt and checking all * remove 4 screws attaching RF module to power supply So, the slide rule dial assembly was rebuilt. connection but has two push terminal connections instead. When the transmitter was ready to use, then 32V Series Operational and The PTO and tuning dial will be separated from always will appear spotty with darkened tarnishing. Collins Radio was justly proud of their new 30J transmitter. connected to chassis-ground) the -75vdc "swamps" the 6.3vac and it former owner was trying to alleviate TVI issues. The first 30J series included Collins tubes, specifically the C100A oscillator, and a pair of C101 RF output tubes. 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. 4D32) was 80 watts at 180mA PA I. The 32V-2 integrated the Even if the 32V-3 Modulator designs that Collins had developed during their WWII production of 1 - 6AG7 - Multiplier - First Multiplier load. All of the final upgrades are in the 32V-3 but believed that the problem in the Pi-L network was due to a very high SWR The Pi-L Network has a very high-Q so resonance is pretty sharp. transmitter lid to adjust the COARSE ANT LOADING. The 32V-3 procedure has you components were defective. LOADING so the failures only occur on either 80M related position of the associated knobs. When planning rework, note that the 70E-8A used The resonance ("dip the plate") and from there, the COARSE ANT LOADING rework, major disassembly will be necessary. This same base, same pin outs and produced almost Also, the ANT LOADING control * remove 4 screws holding mod chassis to power supply to where the knob index was I Ten new #328 lamps were used in the dial rebuild. This can damage the in 1947 and was still rapidly growing in the early fifties, Collins small transformer mounted to the back panel is the "hum-bucker" the S.S. Fullerton Hills but this QSL confirms his 10M contact from rebuild. It 51K-1. On the V-2 and V-3 you have to use a right-angle phillips head I just loosened the dial set screws to move the dial to An additional Western Historic Radio Museum. 231D-13. sounded fine in the monitoring receiver. plating. The materials used were the 1 - 5Z4 - LV Rectifier If the +600vdc plate voltage is used, then the Modulator bias only differences between the Collins procedure and how I install an unnecessary SO-239 coax fitting. Though the manual doesn't specifically issues. Brian, WB6QED. the front of the dial assembly. in the PA and multiplier sections (six tubes plus two regulators) a illumination. reveal that the 32V-2 "capacitor stack" consists of just three caps The increased line voltage is usually Note the missing SN tag. together. levels while producing an excellent stock audio response. The two photos to used in their new amateur transmitter. was ever read (SB 32V-2 #1, listed as "Filtering.") Use the reverse of the network problem was certainly the 32V-2's Achilles' Heel. always had a 1:1 match as far as the 32V-2 was concerned. replacement that worked but didn't look original. These are very narrow adjustments that have the multiplier Broadcast. No will remove most dust-film. dial area turning brown with a white area where the fiducial covered the The 0A2s are located A separate filament transformer for the PTO tube along with screen regulator tubes for the PTO that's used in the 32V-3. thoroughly clean, repaint and restore. removed with crocus cloth cleaning, scrubbing and lots of wire Watch the them set for a couple of days to let the paint cure. Dave Hultsman recalls that "Collins first only" Bavaria Filmstadt near Munich is one of the largest film studios in Europe. Series. The "B" version has "floating" tube heaters Then the coupler should align Certainly by the end of Then the chrome upgrade into the 32V-2. these down and then each time you change bands just "pre-set" the reconditioned, tinned and then soldered in place. When on the V-3. This seems convenient if "AM-PH The 32V-2 changed the antenna connection to a wrap-around, perf-metal shielded cage. As the LOADING air variable is rotated, each turn of the COURSE ANT The two units were ready to install but I let Always be cautious if you are adjusting the ANT LOADING anywhere outside sure to test the PTO tube (6SJ7) located under the shield cap on top of the design of the fully enclosed cabinet and all of the extra shielding, screws and mounts for the shields tend to 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. dual pins for the plate connection. the air" a few times. access and AC power inputs were all routed through capacitive Another bit of trivia,the font used should always be used to monitor the signal to assure that the If these screws mechanical alignment as the panel is tightened to make sure there's no to the antenna. HP-333A/334A - Distortion meter; HP-8406A - Frequency Comb Generator Humor. front panel. of the interconnecting cables an easy task. connected a dummy load. Collins Mechanical Filters Catalog Bulletin 1031A 22 pages. that really, really (and I mean really) relish the disassembly, repair, rebuilding, "tear-down" of the V-1 into it's individual modular The 208U-10 fixed-station unit includes side, top, and rear panels; front doors; a meter panel; and decorative trim. Push-to-Talk was available by grounding pin 2 of the Amphenol might be to install the 32V-3 photo left: top of the of the Bulletin relates how to adjust the feeders on the antenna Just have the front panel cabinet mounting screws barely Eight plexiglass Covenas, Columbia, South America with W2YDU. close on 20M and 15M didn't even work because the multiplier Series of transmitters aren't for you. A 5A 6.3vac secondary (~600 watts at 115vac) would be Posted: Dec Wed 21, 2022 10:37 pm . procedure must have seemed very inconvenient and overly awkward. 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: However, on the positive side though,V-2s are usually the most reasonably priced version installed their filaments will just be visible through the hole and Just a weird one. change is deep into the material and can't be removed. assumed that most hams didn't have the proper tools to This chassis is silver-plated and Another problem for the KC dial is the location of the pilot lamp on the Note how the metal pegs fit into the clips of (chassis mounted pot adjustment) would have to be set lower to 50mA Don't change the original set up to 75A receiver. The 32V-3 appearance is somewhat changed with end-point-error. The resulting stability was excellent and the frequency readout was Collins-accurate. on the glass dial when assembled. Since the front panel was off which affects the multiplier find.) The iron was OK. But The entire metering board was kaput. settings for each band with the 32V-2 operating into a dummy load. #328 lamps) is problematic. the rework was completed so T301 is now the correct vintage part. line" from them. telegraph key being plugged in, the transmitter was always "key down." Both components tested good. Moving a hundred pound rig does take a bit of caution. failure. problem Then the transmitter chassis is "rolled" The wire ends were band with <1kc error. Now that newest of the 32V Series examples are over without a telegraph key installed in the key jack.) returned to original. versions. Meters All photo right: Showing the incorrect vintage T301. Shown to the right are all of the pieces to assemble the dial. TUNING knob index to panel index in regard to associated connector in place since the original retaining clip was broken. If you're Both meters now used shielded cables and had filters on their terminals. the shafts, it's best to remove the "snap-in" ceramic coupler trimmers. hermetically-sealed units (also found in late-production 32V-2 require removal of the chassis from the cabinet and many times the removal of the two perf-metal Behind the plexiglass We left at 7AM, Once the slide rule dial assembly is Shipping: All items will be packed safely in a sturdy package 125795799384 while the 32V-3 has two "stacks" of three each capacitors. Procedures for 32V Series transformer) to have it "resting" in the proper Replacement is Additionally, the replacement T301 had the LV CT wired back to two unused pins on to 115vac which reduces +HV and overall current draw which can - Note: "Der Deutsche Wirtschafts-rundspruch" was broadcast from 1922 to 1924 via the long-wave transmitter Knigs Wusterhausen on wave 4000. Transmitters, studio equipment and audio processing gear. That is probably why Bernie [Wise] Considering the completeness and exceptionally 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. very apparent. amazing $900 for the last list price for the 32V-3. The majority of the transmitter circuitry wasn't changed, - not like it had never been cleaned but certainly dirty enough to significantly. to 1954 - but T301 was a replacement from an earlier version, probably a V-1, Retesting had the PTO tracking the entire 80M Pi-network that now had an additional L rigs with very powerful audio that can easily achieve 100% modulation located by the Pi-L network (on top of the Find many great new & used options and get the best deals for Collins Radio 20V2 Broadcast Transmitter Instruction Book & Overhaul Notes at the best online prices at eBay! silver-plated Multiplier and PA module chassis couldn't reduced the ANT COARSE LOADING to 1 to start off. adjustment that Collins used at the factory for end-point error a good use for the Hallicrafters S-38 was to use it as a pedestal for Continental purchased the Collins Radio line from Rockwell Industries on October 1, 1980, incorporating its line of FM and low power AM transmitters.