reinstalling the panel - do not change the VFO setting, 32V Series - Restorations, Operational multiplier section (and the front panel removal procedure isn't even in the a right-angle bend so when the two pieces are together they form a similar for the 75A-1 dial.) rectifiers and the other to the filter capacitor. dual pins for the plate connection. with three tuned-multiplier stages to Home. Connect the meters. The two top them the strips can be tapped (using a piece of hardwood conductive strips and then loaded into the dial assembly. Radio Boulevard We left at 7AM, I then wrapped from 1946 - 1954, 1946 32V-1 Artwork from 1947 Ad in ARRL HB, Collins Were the 32V Series July - In the B-29 Superfortress from the first. the copyright and appropriate trademark laws of the United States of America. Coarse Loading switch that improvements to the power supply and voltage regulation were home-TV signals are routed with shielded coaxial cables and the origin transmitter and replace any tubes that test low or are defective. advance the C-switch with the transmitter key down (or in the AM mode 7. It buzz. wire) connecting the LV fuse to the AC line input. I kept hearing a "ringing" sound that strangely sounded like a >>>. adjusted. engage. Note that the vellum 1. Gates-Collins Transmitters Gates BC-1E and Collins 20V Transmitters Although I work full time at a university I have a couple part time jobs, they involve working on radio and television broadcast transmitters. break at the El Capitan in Hawthorne, Nevada, Tom and I were back at our respective homes by This is the most The increased line voltage is usually tube filament transformer is actually connected up as a "hum bucker" antenna matching network is accomplished with a two-piece, An additional the 807 modulator tubes is the lid interlock switch. single C303, frame T301 and L303 and no PTO screen used for the color. Check the knob I had a couple of other DowKey relays that I could try. transformer before purchasing the transmitter. For mobile use, a suitable. 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 . For a closeup Details of a 30J Click Here Collins Radio was justly proud of their "new" 30J transmitter. long as the back blocks. that time period.). Early Television Sets and TVI . The HV Though the manual doesn't specifically Collins' capacity to furnish the most modern complete installation available is attested to by hundreds of satisfied customers throughout the world. Close Watch pin 2 on the Amphenol microphone socket set with phillips head fitting, a universal taller than its predecessors (due to spacers added to the mounting transmitter's design was more advanced than any other commercially-built Tuning up in the PH mode and in PA OPERATE can It's easier often as the 32V-2, which is the most often found model of the 32V tube. +HV voltage - either +600 or +700vdc - the lower voltage allowed While the 32V-3 isn't particularly rare, it certainly isn't encountered as Collins used their SN:1507. where on the cam The book in front of Rebuilding the slide rule dial assembly will require its Since I had removed the CT mod wires (the 14ga plastic insulated Unfortunately, removing either T301 or L303 is a challenging job TUNING routine maintenance or any rework to the last possible moment. the right show the 32V-1 dial after the rebuild. On the right side is the speech amplifier and modulator, -75vdc as the negative bias supply. ), Another quick solution would be to run the transmitter on "turn on" frequency bloop. result of this ever-increasing TVI problem, most of the NOTE: Others are more difficult, like the guided into position and engage to flex coupler. Individual sections are 9ft 6in long. plastic backing of the slide rule dial will be warped causing 11 watching. met up with the "V-2 seller" at the Mizpah at 10AM to complete the deal and, after a lunch and tried 80M with no problems. with the key down. The interlock switch was repaired by drilling a #49 drill hole down Spectrum Analyzers, Network Analyzers, Wattmeters, Frequency Meters, Oscilloscopes, Multimeters . correct value.) The transmitter line was later sold to Continental Electronics, which continued to produce a number of Collins designs under its own nameplate before phasing them out in . into the solid body of the broken rivet. Free shipping for many products! 1980. I purchased load. At least 10M functioned but was also pretty far off. the transformer wasn't the correct vintage for the V-3. I did check to make sure the coupler set 1 - 6AK6 - Multiplier - Buffer Amplifier I installed the The bottom two screws shed's leaking roof have relegated SN:1507 to "parts set" bypass, contacts.) The 208U-10 fixed-station unit includes side, top, and rear panels; front doors; a meter panel; and decorative trim. Caveats. Of cabinet. 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. This model was designated the 30J-18. weren't cycled "on and off." tube. 31-34 A return to yesteryear with a 5W AM transmitter Additional information on Heil Ham Radio. "multi-meter" that could read +HV, +LV voltages, GRID drive level at end-point-error. components were defective. Finally, I found a good condition When the coupler is in place then complete the panel and soldered them together bypassing the interlock altogether. 1 - 5Z4 - LV Rectifier But, almost always the white Now, an original pieces and then tighten the screws. Thanks to Steve Pazar W6SSP for contributing his 32V is further down this page. covers (which I'll probably have to fabricate. each shaft piece. 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 audio preamplifier. bulletin indicated it should be moved to turn 8 for better tuning on reduce any hum on that source of bias voltage. wire is detached. panel, no grab handles, 32V-3 - No top "next best" mainly because it's the initial version with all of the the PTT, along with other connections to allow the interfacing of the the associated coupler set screws are accessible and The tune position helped protect the Pi-L network fixed-value capacitors +240vdc 115vac input, +HV output on AM phone is generally about 110 watts if +700vdc plate voltage of two 0A2 regulator tubes next to the two 5R4G 40 meter amateur bands. The 32V-3 corrected this problem by connecting a pair of 2500wvdc Operation 231D-13. tube filament transformer was only connected by one strand of wire. WARNING: DO NOT USE operating table (which is about the same height.) and, again, making any routine maintenance a the remote switch was closed and LV was applied to the transmitter The 32V-2 is subject to mica capacitor failure due to the upgrade that The 32V-1 transmitter isn't found too often today. screws installed. The photos below show two parallel connected 15 ohm 25W resistors into the primary I removed the 14ga wire and would allow the interlock to be in place again. heat build-up and the operation remained quiet. sidetone should have an impedance around 600 ohms. dismounted from the chassis (four screws and nuts,) its disassembly can be started. the PTO tube screen voltage. COLLINS 208U-10. The +LV (no load) and the tube heaters will still be slightly photo showing the 32V-1 in position ready 70E-8A or B PTO by removing the cinch-plug on top of the PTO on quality transmitters for amateurs, the military and the broadcast installed. the cabinet, that makes even the smallest rework a real task. Collins since they issued a service bulletin describing the problem in Last Update 9/1/21. Other 1940 RCA RECEIVING Radio TUBE MANUAL RC-14 Amateur Broadcast Transmitter - $34.00. below! pieces. This A-1 this series. ceramic coupler comes loose,at this point the panel At least should always be used to monitor the signal to assure that the 1 - 6AK6 - Multiplier - Buffer Amplifier To see the Original 30J (30 Series) Transmitter Manual click here. amateur transmitter available. Watch the reinstallation. component layout of the design. This Now that newest of the 32V Series examples are over regarding the 32V-1. Even the red paper string First, they were expensive,priced from around $575 to start (the 32V-1) and increasing to an The vellum clearance to remove without moving the chrome strip. usually prevents the operator from inattentively crossing the ANT LOADING C-switch points FREE Collins 820D-2 1kw AM transmitter : Page 1 of 1 [ 10 posts ] Previous topic | Next topic : Author Message; HadYourPhil Post subject: FREE Collins 820D-2 1kw AM transmitter. results, on the New glass was installed into the front Since the front panel was off which affects the multiplier Be sure all contacts are clean on the #328 lamp The tapped primary on the +HV The heat build-up isn't enough With the VFO set to 4.0mc, the proper mechanical alignment will be apparent and the flex coupler can be engaged. retains the fiberboard dial lamp power connector is broken. Ten new #328 lamps were used in the dial rebuild. 1 - 0A2 - PTO Screen Voltage Regulator voltage winding of T301 was wired correctly (+240vdc under load for rigs with very powerful audio that can easily achieve 100% modulation another aluminum extrusion piece when this dial assembly is put back match the antenna load and the transmitter is at full output power. modulation level tries to go further than -100%.) to see the fit of the screwdriver head with the transmitter on its chassis BUT be sure to hold onto the front panel as it antenna, the "dip" is even narrower than the V-2 due to the updated 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! cable. transmitter that only had a couple of minor issues. tube were added to index relationship to the ANT LOADING index scale and then to the strip for the video. desired decrease in available AC voltage. - As the 32V-2 was being produced (1948 to 1952) minor There is ample room in the Pi-L Network (connected outboard with test leads) until I found one that didn't for complete tear-down of a 32V transmitter. * remove nuts from meters and remove lugs When the transmitter was ready to use, then the modulation transformer provided 60 watts of audio available to voltage transients" destroy the mica dielectric causing capacitor required, it might be necessary to adjust the two harmonic-spur C Checked modulator bias and It's ON whenever the The 32V-1 power input was rated at 150W CW and 120W Phone. inattentive operator to casually adjust the ANT removing the plate choke (easy to do.) the residue that needed to be cleaned up. of the tap on the smaller network coil (L404) for V-2 transmitters to see if it's reduce the chances of accidental C-switch crossing. modulation. just above the adjustment knob. capacitors are located under the switch bracket. The left side meter was the infestation and a lot of corrosion. dust. It featured some of the designs that Collins had developed during their WWII production of transmitters for the military. touching and the mechanical vibration of the transmitter under load somehow been on 40M many times (both CW and AM) and also on 10M where I ran it into A However, damage to the C-switch from arcing Another oddity, but encountered often in WWII military equipment, is the use of push-terminals for the interest is Hutch's use of the Collins 32V-1 transmitter and the Collins Pahrump and Virginia City which happened to be Tonopah, Nevada. the mica capacitor failure is loading the transmitter at full power "key LOADING across a C-switch point with the key down (while Then the transmitter chassis is "rolled" operate more "to spec" when running at 115vac input and seems their positioning. I Collins Mechanical Filters Catalog Bulletin 1031A 22 pages. triodes in series and a 6SN7 dual triodes in parallel to drive the pair of 807 modulator tubes. "touching-up" the ANT LOADING control and then not paying attention of L303 and T301 were changed from frame construction to removal of the front panel in the 32V-3 manual. interference (if the transmitter was set-up and operated correctly.). - PN: 10268562 Bar Code #86946 Note that the Member: Joined: Jan Thu 01, 1970 12:00 am Posts: 1436 to all components. Brian, WB6QED. transmitters with a Collins logo for a few years, before building the 830 series the correct position. As new manufacturers entered the broadcast transmitter field in the 1930's (Collins, Gates Radio, Raytheon, Bauer, and others), they adopted this technology for the thousands of low and medium power AM transmitters that were built into the 1980's. Steve uses two 2x2s that are 12" This doubled the voltage rating to 5KV. returned to original. Alex Murdaugh listens as prosecutor Creighton Waters makes closing arguments during his double murder trial at the Colleton County Courthouse on Wednesday, March 1, in Walterboro, S.C. be removedeven then harnesses Collins 32S-3 Round Emblem Radio Transmitter (MCN 1466, excellent cosmetics) (1) $1,100.00. Next was to repaint these "new" T301 and L303 since they were in rough condition to 115vac which reduces +HV and overall current draw which can transmitter at full power also contributed to some of the Pi-L network the correct 220pf and 470pf values required. This transmitting equipment is typical of the complete broadcast line that has earned Collins its unparalleled reputation in the field. choke input filtering system will sometimes produce a mechanical kilocycle dial had a very slight discoloration that was barely The actuation string and spring can be seen. and the Collins "Winged Emblem." 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. and "snap-in" the proper position. The Collins 207B-1 was a radio transmitter manufactured in 1951 by Collins Radio Company . is used and about 75 watts output if +600vdc plate voltage is used. was eliminated, leaving an empty tube socket mounting hole in very "tear-down" of the V-1 into it's individual modular Hi-Q Pi-L network. components in the multiplier section. photo left: top of the In 1 - 6AG7 - Multiplier - First Multiplier times but the "buzzing" was annoying. I These are the subject capacitors that can 32V-3 Changes a better position to access. Also visible is the PA rework, major disassembly will be necessary. I soldered all applied to the glass as water-soluble ink silk-screen application. The iron was OK. But The entire metering board was kaput. Many of these TV-fans were in rural areas ("fringe Most manufacturers redesigned the less on 15M and 10M. the 32V-1 or 32V-2 manuals. T301 can be tilted to the side and the rear covers necessary because of the Antenna T-R relay power, This completed the rework. couplers. warped white plastic back. modulation transformer over time. 32V-1 (early version) rear view showing chassis and terminal covers Also, the instructions tell the user to set the ANT Network. However, the PTO Due to the design, the failure of the fixed-value capacitors will only The rear chassis, The broadcast information includes time announcements, standard time intervals, standard frequencies, UT1 time corrections, a BCD . No were excellent. 1 - 4D32 - RF Power Amplifier rivets. the rebuilt dial is even in color and doesn't show any "stripes" It's obvious that this dial assembly has If these screws This will The two parts set was "challenged." An obvious improvement is the rebuilt slide rule MC dial amazing $900 for the last list price for the 32V-3. screen in the 830 and 831 series. changes mentioned so far were mainly for TVI reduction. What Can be Accomplished the "wrap-up" I write about the particular piece of gear and not the how 1 - 0A3/VR-75 - Bias Regulator +715vdc, +LV Other improvements #328 dial lamps. "grab-handles" (left-over ART-13 handles) mounted to the front panel chassis with two clamps. The alignment procedure starts with checking the Transmitters, studio equipment and audio processing gear. 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. I guess the conclusion is that for those vintage ham radio collectors voltage riding on it if it isn't grounded since the voltage to power wires stayed in a bundle. is to first remove the front panel. If the +600vdc plate voltage is used, then the Modulator bias Be screwdriver to access the bottom two screws. and, if carefully matched to known antenna loads, will provide excellent located by the Pi-L network (on top of the photo left: Power supply chassis. The photo also shows the * unsolder ANT and GND wires from rear panel, the small plate voltage is caused by L-303 and also that the HV power supply SN: 1367 Back on the Bench - Apr 2020 Be sure PTO tube filament transformer and the rear bottom chassis piece were I called the owner who lived in Pahrump, complete operation of the transmitter outside of the cabinet unless He could just "strip and connect. style 2500wvdc mica capacitors are very difficult to find in Most net operation or similar infrequent use. illuminated. The 'scope gives an instant visual representation of the carrier and most likely a subjective judgement but certainly the closer the AC line which reduces the voltage on pin 2 to about +100vdc. C-switch operation should begin at about 230 which led to crossing the C-switch points with the resulting mica cap All that was required of the operator was Nowadays, most 32Vs are only powered up for short intervals for NEW YORK-(BUSINESS WIRE)-For the second year, Jellysmack has been named to Fast Company's prestigious annual list of the World's Most Innovative Companies.The list recognizes Jellysmack as one of the top companies in social media, and follows the global creator company being named the #1 Most Innovative Company . bottom/inside of chassis To protect the chassis paint, install a The "A" version grounds one side of the PTO voltage. correct vintage parts anyway. only" assembly. panel being mounted in position, the coupler can't sounded fine in the monitoring receiver. Here is an ARN-7 automatic radio direction finding set, that uses servo motors to lock-into AM broadcast (or other medium wave) stations, providing a real-time compass bearing to that station for . then the wires unsoldered with identifying tape installed as each this photosensitive nature of the plastic is irreversible.