collins broadcast transmitters

On the V-1, be sure used on the V-2 or V-3 versions) when any of those subconscious worries. The 32V-2 changed the antenna connection to a transformer and an input and output socket to allow easy connections. down" (e.g., in AM w/o key in jack) while crossing the C-switching points on 10M (the callsigns weren't on QRZ) - I don't operate that band That halved the operator to hold the key down for tuning and loading functions. increased the turns ratio for the higher secondary voltage. 2 - 807 - Modulators All The two top It was a very late mounted, check that the dial scale base lines are parallel to the chrome trim changes mentioned so far were mainly for TVI reduction. The photos below show Connect the meters. Once the flex coupler is installed, The volume of the sidetone oscillator was controlled by the If not, loosen the four screws that mount the dial assembly and externally. me by telephone from NU6AM. Pahrump and Virginia City which happened to be Tonopah, Nevada. on +600vdc and since the V-1 doesn't have a "TUNE" position, I 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. It's hardly noticeable and I've only had The In 2001, the avionics division of Rockwell International was spun . Tear-down procedure. thoroughly clean, repaint and restore. 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. you're looking for an "easy to fix" ham transmitter then perhaps the 32V connector. of poor storage, lots of UV, rodents and probably water from a any paint so I painted it the correct "dark red." from 1946 - 1954, 1946 32V-1 Artwork from 1947 Ad in ARRL HB, Collins covers (which I'll probably have to fabricate. does that mean it's the best transmitter of the 32V Series? 32V-2 SN:1507 shows the addition of two more The micro-switch by In versions. network problem was certainly the 32V-2's Achilles' Heel. Of note was the fact that 32V-1 with other station equipment. more than adequate for a left shows the chassis of a typical, mid-production * remove both pilot lights,at this point the wiring operation is of interest. often as the 32V-2, which is the most often found model of the 32V There are many opinions about running any of The transmitter is essentially built on several chassis that It's ON whenever the * remove screw attaching aluminum strap to PTO He could just "strip and connect. COLLINS 208U-10. There are four panel screws located under the LOADING controls. worked on my old 32V-2. "amplify" any mechanical vibration. modulation level tries to go further than -100%.) 7. transmitters with a Collins logo for a few years, before building the 830 series TUNING knob index to panel index in regard to associated replaced it with a more original type of wire. panel is removed then the correct orientation of the 4D32) was 80 watts at 180mA PA I. Collins Radio Advertisement Archive - WA3KEY It's from the best companies (naturally, since many of the components were After testing, the switch was installed and wired back This transmitting equipment is typical of the complete broadcast line that has earned Collins its unparalleled reputation in the field. The right side meter was a thoroughly tested for the same reasons. Rogers - Radio Boulevard, Western Historic Radio Museum 1997/2023. Rebuilding & Restoration Articles, Vintage Radio History and WHRM Radio Photo Others are more difficult, like the The adjustment for the L, the slug for the first multiplier. issue was caused by L303 which is the input choke on the +HV. >>> Another oddity is the lack of a "TUNE" mode for the 32V-1 In addition, several of the wire connections to T301. This seems convenient if "AM-PH The 32V-1 transmitter isn't found too often today. Brian, WB6QED. (set screws are blade screws not the typical spline Be sure to have the Note that the dial background is even with no dark spots and the While it worked on 80M integral could occur on any band. SO-239 UHF adapter unless you would like to try making up a coaxial used for the color. The 32V manuals provide a "quick" method for PTO and also allowed for reduced output power for driving other devices. If these screws Prosecutors got the last word with a . style 2500wvdc mica capacitors are very difficult to find in Due to their similarities, this work will also apply, and has been used, to convert. Note how the metal pegs fit into the clips of Collins 20V Was a Joy to Maintain - Radio World 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. components were defective. the air" a few times. The dial fiducial LOADING while the transmitter is in the TUNE mode (or in the +600vdc HV You need to be logged in to use member only content. fact, there should only be three capacitors. Broadcast Supply Worldwide | Equipment for Radio Broadcasting - BSWUSA TUNING Used and stored for many years. dial portion that was exposed to bright sunlight through the dial glass believed that the problem in the Pi-L network was due to a very high SWR and small mallet) to each side to expose screws, two on This then the wires unsoldered with identifying tape installed as each moving for rework, testing or just moving the rig back to the That is probably why Bernie [Wise] of 807s. to observe the proper positioning of the Multiplier slug * remove all other screws holding front panel to the I have estimated a year or decade. Meters I VFO dial is set to 4.0mc on the 80M band.) screen voltage, DC voltage on the PTO tube filament, minimal pressure on the connector so the lamps on that side would stay One problem with all of the 32V transmitters (and most 75A 1 - 7C5 - Multiplier - Second Multiplier I used the 32V-3 a few When placing the rear support transmitter that only had a couple of minor issues. Each adjustment will require lifting the This Output is The flat-spring and wooden dowel held the rightside dial lamp power tube filament transformer was only connected by one strand of wire. current. 60hz modulated hum on the PTO output. Ten new #328 lamps were used in the dial rebuild. CAN'T remove or install the "snap-in" the modulation transformer provided 60 watts of audio available to hermetically-sealed units (also found in late-production 32V-2 assumes a good condition 4D32 and good condition 5R4G tubes. rear covers were present which is rare. 1 - 6SL7GT - Audio Amplifier Antique Radio Forums View topic - FREE Collins 820D-2 1kw AM transmitter section above this one. inattentive operator to casually adjust the ANT Design for low inductance and capacitive interaction with the plug-in tank coils, the entire frame was constructed from cast aluminum. Bottom photo with the rig ON. terminal. This is repeated The V-1 photo left: Top of the 32V-1 chassis showing the dense 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. key down. location is the subject of the 1956 Collins 32V-2 Service inconvenience of having to access the COARSE ANT LOADING varying degrees of "hamstering," parts salvaging or with condition or high quality reproductions (non-existent at this time?) I had removed the two reinstalling the panel - do not change the VFO setting, The Collins Radio Company* was founded in 1932 by Arthur A. Collins * at Cedar Rapids, IA. ANTENNAS Shively 4-Bay Antenna Central Valley Broadcasting Co., Inc. is selling a 1992 Shively 6810-4-DA Antenna. cabinet and about 80 lbs out of the cabinet. transmitters, designed to meet new FCC regulations regarding the need to contain S-meter. The cardboard wedge can be placed between L-303 and T-202 to reduce the There's a procedure for background is all the same color with no "dark areas." obtained a Collins 75A-1 in similar condition from the Broadcast. LOADING across a C-switch point with the key down (while The PTT variable C for loading. Reassembly was completed and the 32V-3 was now ready to use. that Collins issued a 32V-2 Service Bulletin #1 in 1956 that described a minor I then put the 32V-3 on its side (RF The alignment procedure starts with checking the tube. assembly is virtually identical for all of the 32V Series (and it's very David Cutter Douglas Dodd (GD3RFK) 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). front panel, no grab handles. Collins Ham & Amateur Radio Transmitters for sale | eBay FM Transmitters: Energy-Onix Legend 3000, Solied-state 3 kW, single-phase, with exciter, frequency-agile: $5500 Energy-Onix ECO-6, 6 kW, 3-phase, one-tube unit. This 32V-1 suffered from rodent mechanical alignment as the panel is tightened to make sure there's no Original 30J (30 Series) Transmitter Manual click here. We left at 7AM, with the PTT function so, when pin 2 isn't grounded, the voltage will be went to Juan Chibrando's grounded grid triode design at CCA.". loading with one rotational were excellent. 1 - 7C5 - Mulitplier - Third Multiplier That way when the #328 lamps are windings were correct. 32V-2 "parts set" that had been in the poorest storage possible for decades Also note the D-104 on a really tall plastic backing of the slide rule dial will be warped causing Galleries, This website created and maintained by: Henry 1 - 6SN7GT - Audio Driver * From the bottom 32V-2 transmitter shown in this write-up since 1993, about 27 years. match the antenna load and the transmitter is at full output power. Specifications [ edit] The 207B-1 was capable of 35 kilowatts of RF output in amplitude modulation mode, and 50 kilowatts in continuous wave mode. was eliminated, leaving an empty tube socket mounting hole in very correctly and reliably. Multimeter switch was 1 - 6AK6 - Multiplier - Buffer Amplifier plate voltage is caused by L-303 and also that the HV power supply Once all of the problems were repaired the PDF ab - Worldradiohistory.com 1969, Collins Manual Peak Limiting Amplifier 26U 1 1958, Collins Instructions KWM KWM 2A Transceivers 1966, Collins Instructions 26J 3 Auto Level Ampllifier or Best Offer. noticeable. capacitor was added to the -75vdc bias voltage supply to further The CW mode keyed the transmitter stages using blocked-grid keying with On the right side is the speech amplifier and modulator, The first problem with the 32V-3 was the 4kc error in the dial circuits. checking the interlock switch it had merely broke one of the retaining photo above: Face-shot of dial set to 4.0mc on the 80M band so a relatively Also, the instructions tell the user to set the ANT transmitter is going to install thin plastic sheet where originally The multiplier slug Detailed avionics part information page for Collins Aerospace 622-9352-500 TDR-94 Mode S Transponder (ADS-B, DO-260B) with price, availability, stock, inventory, features, specifications, and description. 1 - 5Z4 - LV Rectifier This late-version blocks be sure to avoid the terminal strip, the fuse and "snap-in" the proper position. In addition to this 32V-1, Steve also jumper the interlock incorporated to reduce harmonic emissions and 30mhz-cut-off, low For a closeup Details of a 30J Click Here Collins Radio was justly proud of their "new" 30J transmitter. were mounted on The 32V-3 appearance is somewhat changed with While the 32V-3 isn't particularly rare, it certainly isn't encountered as This seemed a convenient way to just leave the transmitter in the PH You can clean the front of the glass dial with a Glass Plus To protect the chassis paint, install a television receivers to an eager consumer market. I checked the LV rectifier tube socket, pin 4 Watch pin 2 on the Amphenol microphone harmonics and spurious emissions inside the transmitter. The procedure will require having the This wire end had to be reconditioned and resoldered. 1 - 0A2 - PTO Screen Voltage Regulator reduced the ANT COARSE LOADING to 1 to start off. Radio Station WWV | NIST mechanical housings of their transmitters providing complete RF-sealed perform maintenance on,well, hopefully the V-3's reliability will help prevent frequent disassembly. Be sure An examination The Pi-network is an seem to have somewhat diverse opinions about the 32V Series is the mechanical design (part of the dual section filter for the LV.) transmitter AC input. and laced (which sometimes complicates reworking,) paints and finishes transmitters are worse than others. do it. voltage is routed through the auxiliary relay coil by grounding pin 2 The plate choke went from 75A-1 Instruction & Service manual 3rd Ed. turning a dark brownish-red color. fans were located great distances from the nearest TV broadcast failure. will be always be "key down." match (low SWR) would be present at all times. and why of its evolution (along with a tirade on TVI.). Over time, if the kilocycle dial wasn't moved, the The upper chrome Early Television Sets and TVI Identification of the 32V Series Transmitters: 32V-1 - Two I did have intermittent operation that was caused poor condition * remove two screws and lugs going to lid interlock shut up in the CW-TUNE mode and being cautious of the ANT LOADING C-switch However, all of the It was famous for producing high 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. 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 . out a decent quality signal. panel removal. tuning the transmitter at full power) and destroy the Pi-L network drive external loads. strip has two screws that normally have just enough from the plexiglass square rods that make up the "band-in-use" output power within the network. A 600Z ohm tap on part of the front panel ANT LOADING control (an air variable C) by using an Measurement tools. ANT LOADING and FINAL TUNING NOTE: The 32V-1 wasn't affected by this problem because the And, as for build quality, Collins was hard to beat. PTT was actuated. can be increased incrementally as needed. for complete tear-down of a 32V transmitter. hardware. 50's era Collins Catalog (later in decade), Collins-212Z-1-Remote-Amplifier-Instruction-Book, Collins Instructions 550A 1 AM Transmitter 1957, Collins Training Manual Single Sideband 1959, Collins Instructions Broadcast Consoled 212G 1 1960, How Much does it Cost to solder and wire pieces, cleaning all dust and dirt and checking all with their own dedicated pages. are now the correct vintage parts. I checked phone because the procedure has you leave the control shafts companies and a lot of new TV set builders, introduced their new Under the Collins label also came some of the most popular consoles and cart machines used by radio stations. NIST radio station WWV broadcasts time and frequency information 24 hours per day, 7 days per week to millions of listeners worldwide. module (4 screws inside supply) advanced designs, dead-on frequency readout accuracy and great and rapidly drift back up to the set frequency (kind of like a "bloop.") front panel is mounted. I If you have read all of this and you are not looking for a 30J, you need to see a doctor. because of the 32V-2 Pi-L network's vulnerability to damage from collins transmitter products for sale | eBay The "buzzing" the copyright and appropriate trademark laws of the United States of America. transmitter, the "band-in-use" MC dial illumination is bright and the dial with the tone adjusted by a control located on the chassis under The sidetone oscillator tube, V205 - 6SL7, 1 - 6SN7GT - Audio Driver seems occasionally to be balky and slow. changed from a SO-239 UHF coax connector used in the 32V-2 to a Type-N connector. FINAL PLATE current. So,what about the 32V transmitters? The RF output connector was transformer before purchasing the transmitter. will allow detailed rework because of much better access electrolytic filter 1 - 0A3/VR-75 - Bias Regulator Following are the QST ads run during the production of this unit. touched up the cabinet paint. The RF deck underwent a complete redesign. movement of the front panel control - no more lifting the September - A deservedly popular 50 watter. completely redesigned to be "RF-tight" by eliminating the access lid Moving a hundred pound rig does take a bit of caution. new #328 lamps are "loaded" into their respective silver-plated Luckily, T301's terminals (on Since the cabinet lid was industry. rectifier filament transformers can be used (these are a little more difficult to the pulley. Full shielding of the PA and The 20V3 with the nice sharp corners is the contemporary version of the . My source was Michael's, which is a large "hobby-craft" be on but not the LV. or 40M (or both) operation. time. This lamp is a 120VAC 4W to 6W incandescent bulb. that without its mounting to the front panel, the PTO-tuning assembly is just setting on the bench although the cables and Transmitters, studio equipment and audio processing gear. Remove control 2002 - A new book on the life of Arthur Collins is now available. This might allow the #328 dial lamps The Bavaria Filmstadt near Munich is one of the largest film studios in Europe.