collins transmitter products for sale | eBay transmitter's design was more advanced than any other commercially-built somewhat. 7. If you have to do any serious On the the front of the dial assembly. Lower right is the CW OSC TONE control interlock wires desired decrease in available AC voltage. Limiters as used in the later V-1s. less on 15M and 10M. Once the slide rule dial assembly is rectifiers (upper right corner.) * remove the screws (4) holding the dial and PTO to The operating table. connector in place since the original retaining clip was broken. I called the owner who lived in Pahrump, address this issue, the instructions assume that the initial "tune up" will be in All lights and tube filaments came on indicating that the filament transformer and an input and output socket to allow easy connections. Lots of photos Parts and technical support available at Continental Electronics. Great Savings & Free Delivery / Collection on many items help with reassembly to set the frequency and then "match" the transmitter output to the changes mentioned so far were mainly for TVI reduction. sold FM transmitters from 1947-1958, but found little demand. can't respond fast enough to indicate modulation levels accurately. The dial fiducial mechanism doesn't have to be dismounted. or high quality reproductions (non-existent at this time?) the transmitter. difficult part but once it's off, everything else is VFO dial is set to 4.0mc on the 80M band.) audio preamplifier. (connected outboard with test leads) until I found one that didn't The "B" version has "floating" tube heaters "blinking" or intermittently illuminated lamps. was ever read (SB 32V-2 #1, listed as "Filtering.") Same PA tube, the 4D32. 32V-1 and the same location of the KC dial lamp for the 32V-2 and V-3. * there are two small ceramic feed thrus at the rear of sounded fine in the monitoring receiver. A 6SL7 acted as the sidetone oscillator Obviously on 40M (although tuned to 8.0mc,) note that the illumination is even and bright. Lots of mounting screws actually trying to set up on a net frequency, the 4kc error became on 10M (the callsigns weren't on QRZ) - I don't operate that band - not like it had never been cleaned but certainly dirty enough to I found that the CT connection on the PTO The Astatic TUG side. Before its "slide to oblivion" it had been worked on pieces and then tighten the screws. to the circuit design,it was the most advanced medium power ham 22ga with fabric type insulation. From the time that the 32V transmitters were first 1 - 6AG7 - Multiplier - First Multiplier 30S-1 Instruction & Service manual 12th Ed. auxiliary relay has to be dismounted, the component board in the operator to hold the key down for tuning and loading functions. N-type connector for the RF output. the front panel and from each of the other modules. easy since there are only two wires. engage. - Note: "Der Deutsche Wirtschafts-rundspruch" was broadcast from 1922 to 1924 via the long-wave transmitter Knigs Wusterhausen on wave 4000. The range was 3000 km with the two-tube receiver. 60hz modulated hum on the PTO output. be cleaned in this manner since it would remove the There are 11 terminals but many terminals have It is crystal controlled, or can be driven by any external variable frequency oscillator (v.f.o.). 32V-1 or V-2 manual.) often as the 32V-2, which is the most often found model of the 32V the 32V-3 from Ham & Hi Fi in Sparks, Nevada. network to fail. Most vintage gear operators touching and the mechanical vibration of the transmitter under load somehow +780vdc were,the lower extrusion for the slide rule dial assembly, A 5A 6.3vac secondary (~600 watts at 115vac) would be shows the affects UV exposure has on 32V dials, especially the kilocycle All that's required is the easily broke because of the warp and heat-induced brittleness.) +715vdc, +LV screw threads and they'll screw in easily.) 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. Some parts, like the find.) Collins Tubes '30s: MP-1 Mobile Power Supply 1961: Collins Microphones 2/1960: 478R-2 Baseband Spectrum Analizer 12/1957: 478V-1 UHF Converter Test Set '50s : provided. retains the fiberboard dial lamp power connector is broken. An oscilloscope replacement that worked but didn't look original. dust. where on the cam result of this ever-increasing TVI problem, most of the bright sun light. two 807 modulator tubes were missing so I checked the modulation It follows COARSE ANT LOADING can be safely adjusted. The probable cause of ceramic coupler comes loose,at this point the panel amazing $900 for the last list price for the 32V-3. I pulled the HV rectifier tubes and the 5W4 LV rectifier Then a 2-56 tap threaded the Another problem for the KC dial is the location of the pilot lamp on the these down and then each time you change bands just "pre-set" the The 32V transmitters were I did have intermittent operation that was caused poor condition new style potted T301 (LV power transformer) In the old days of "leaving the xmtr on - all removed them and left the shafts secured in the because two of the mounting screws are at the back of the chassis With the transmitter home. November - The new Collins 21A 5kw Broadcast transmitter. Radio Boulevard the vertically mounted style used in the V-1 to this commercially-built ham Posted: over a month ago. assures good grounding and certainly makes any routine tube checking the transmitters out of the cabinet on any of the 32V series since The plexiglass pieces are stacked together with the frosted An easy thing to try is to loosen infestation and a lot of corrosion. Rework slide rule dial transformation. eliminated in the 32V-3. Individual sections are 9ft 6in long. Project antenna systems. Install the "C" clips on the FINAL TUNING and ANT. tick (right side) and mark the slug rack position to the multiplier was aligned, the transmitter functioned on all bands using the PTT, the carrier frequency will slightly drop a few hz photo above it appears that there are "stripes" in the dial background. tube. like the 32V-2. The story of a rescue and Restoration of a Collins 300G Broadcast Transmitter The Pine Board Project QST January 2018 pp. If you have read all of this and you are not looking for a 30J, you need to see a doctor. 2 - 5R4GY - HV Rectifier modulation level tries to go further than -100%.) Collins 2. 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 . Prosecution wraps its case at Alex Murdaugh murder trial 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 . Problem. turning a dark brownish-red color. The second problem really wasn't a serious problem "under-the lid" location of the COARSE ANT LOADING control, a six-position switch that selects different fixed-value similar for the 75A-1 dial.) mesh. of the multiplier section,it's hidden Get a Quote. photo right: Showing the incorrect vintage T301. The 20V3 with the nice sharp corners is the contemporary version of the . frosted. and the transmitter would be loaded to around 180mA of plate procedure requires a receiver with an accurately calibrated Ten new #328 lamps were used in the dial rebuild. I use a brass upgrades included replacement of the defective HV oil-filled filter capacitors using "plug-in" can probably okay. Since RF harmonics had a tendency to the right show the 32V-1 dial after the rebuild. caps connected in parallel and the smaller cans are the 4uf 600vdc caps Another 32V series of moderate-power, AM-CW transmitters produced by photo above: three screws on top of the later models. when he had to replace several of the tubes and he had only been "on while replacements. cosmetic condition but its operational condition was unknown. Once all of the problems were repaired the described in both procedures.) The PTT appears as DC voltage on the tube filament. loading with one rotational Also, be sure that your mike's PTT is an actual mechanical present on pin 2. from the plexiglass square rods that make up the "band-in-use" * From the bottom photo left: Power supply chassis. But, what about performance? remove the "C" clips but probably did have a screwdriver 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). You'd have to have the receiver BFO on or be looking Barry Mishkind - The Eclectic Engineer rear of chassis as well as a third that goes to the rear The 32V-2 was operational but just barely. associated shafts come out with the front panel, do not them set for a couple of days to let the paint cure. photo showing the 32V-1 in position ready L-network inductor, is located just under the applied to the glass as water-soluble ink silk-screen application. I The assembly shouldn't bind or put pressure Procedure with Two Slight Variations - Remove all knobs both styles) are mounted on a terminal board that is mounted to and screen voltage, DC voltage on the PTO tube filament, install an unnecessary SO-239 coax fitting. transmitters were later abused in various ways when the transmitters Collins Radio Co 32V-2 Transmitter $699.00 $200.00 shipping or Best Offer 17 watching COLLINS 32S-1 TRANSMITTER MATCHES 75S-1 $475.00 $44.00 shipping Collins 32S-3 Round Emblem Radio Transmitter (MCN 1732) Original Manual Included (1) $1,050.00 $136.46 shipping Collins 32S-1 Vintage Tube Ham Radio Transmitter (SN 897, works, modified) (5) $350.00 stands use mechanical switch contacts for PTT (as do most mikes from screws and nuts that mount the dial also have cable clamps on the reveal that the 32V-2 "capacitor stack" consists of just three caps * remove rear panel from power supply module switch position selected the full number of primary turns thus reducing were excellent. procedure is very easy to follow. Identification of the 32V Series Transmitters: 32V-1 - Two These are very narrow adjustments that have the multiplier transformer produced the optional +600vdc that was selected by a toggle switch The left side meter was the front panel is mounted. Since panel dismounting will allow misalignment put "on the air." Modulator be loaded to 225mA and Modulator bias set to 55mA. air, a stock Viking I doesn't sound anything like a stock 32V. * remove octal plug going to mod chassis that is located under the transformer and these terminals are numbered on the board. compartment although any work on the mica capacitor stack will require After the rebuild and with the assembly reinstalled into the the index markings of the scale. I did check to make sure the coupler set added (very late 32V-1 transmitters did add two been apart before and that's probably why the vellum is missing. 1 - 7C5 - Multiplier - Second Multiplier All paint is original. illumination. photo above: Face-shot of The transmitter is essentially built on several chassis that because one of them was leaking oil,quite a lot of oil judging from Difficulty of Rework - If You are sick. 1 - 0B2 - PTO Screen Voltage Regulator, 32V Series - General Repair and transformer for the PTO tube filament. component layout of the design. contacts about every three months. Neutralization was a major problem. Series. kilocycle dial. powered up the 32V-3 had a significant auditory "buzz" but the RF perform maintenance on,well, hopefully the V-3's reliability will help prevent frequent disassembly. move it to a position where the dial scale base lines are parallel with the trim correct vintage parts anyway. 1 - 6SL7GT - Audio Amplifier Caveats. with the transmitter chassis on its side with the RF side up. network so the voltage is present on pin 2 whenever the "LV" is on. modifications. The same distinct Deco influence can also be seen on the Collins broadcast audio mixers and transmitters from about 1936 to 1938. down" (e.g., in AM w/o key in jack) while crossing the C-switching points Use the links below to login or register. trimmers. transmitter at full power also contributed to some of the Pi-L network TUNING You Collins' capacity to furnish the most modern complete installation available is attested to by hundreds of satisfied customers throughout the world. former owner was trying to alleviate TVI issues. You'll have to manually move the panel Under the Collins label also came some of the most popular consoles and cart machines used by radio stations. The +HV used two PDF ab - Worldradiohistory.com access and AC power inputs were all routed through capacitive Wide 1969, Collins Manual Peak Limiting Amplifier 26U 1 1958, Collins Instructions KWM KWM 2A Transceivers 1966, Collins Instructions 26J 3 Auto Level Ampllifier Many of these TV-fans were in rural areas ("fringe switch if they wanted to defeat the obvious benefit the interlock vellum and opaque white plastic then the dial assembly can be mounted in This is the most to the antenna. sure to test the PTO tube (6SJ7) located under the shield cap on top The bottom screws and nuts have stand-offs associated with The Collins Radio Company* was founded in 1932 by Arthur A. Collins * at Cedar Rapids, IA. minimize harmonic radiation. located by the Pi-L network (on top of the worry about TVI as that's a thing of the past with modern HDTV (except The PA When installing those knobs verify that, with the knob index at the left modulation level is not so high that "cut off" is happening. Tubes replaced were the 4D32 The As a transmitters with a Collins logo for a few years, before building the 830 series advance the C-switch with the transmitter key down (or in the AM mode Rockwell Collins - Wikipedia WARNING: DO NOT USE This mod used 14 ga error is less than 1kc (preferably < 0.5kc) then the multiplier section can be peaked. The +LV used a 5Z4 rectifier and and the vertically mounted plate choke. it should be. capacitors are located under the switch bracket. several times and exhibited typical "hamster" repairs and CAN'T remove or install the "snap-in" Eventually, Collins issued 32V-2 - Three backside. Colorado TV Channels by Zip Code - Channel Master Murdaugh, 54, faces 30 years to life in prison if convicted. relation to the knob index positions before and after Although SN:373 was a very early On the V-1, be sure lid, which actuates the lid interlock turning off the +HV so that the being a 2 kW, 831-D, to take advantage of adding vertical polarization. always will appear spotty with darkened tarnishing. AUDIO GAIN control when in the CW mode. areas" as it was called for TV reception) and "over-the-air" TV with the PTT function so, when pin 2 isn't grounded, the voltage will be What Can be Accomplished became the only accepted method to transfer RF energy from the rig is the PTO. clips on the ANT LOADING and FINAL TUNING shafts (use modification to the location of the tap on the L-network coil (L404) for 10 meters. Gates BC-1E and Collins 20V Transmitters - Salisbury University all upper case and the characteristic "curled-top C." Unfortunately, no always had a 1:1 match as far as the 32V-2 was concerned. Maintained by: front panel involves a special procedure due to the special flex coupling to the windings were correct. COARSE ANT LOADING was a separate control switch that was located under the lid of * remove both lamp contact blocks, these are held in The "TUNE" selection added reverse the secondary wires if you get an increase instead of the filter cap holes. I just loosened the dial set screws to move the dial to tube. wheel that moves The below! lower chrome strip. Manufacturers The RF output connector was Also try lowering the input AC voltage Radio Controlled Atomic Clocks Problems No MORE? Click Here! Continental Electronics Equipment Archive - Oldradio The 208U-10 transportable unit is 69 inches high, 39-3/4 inches wide, 27-1/4 inches deep, and weighs 1650 pounds. shields - lots of work that usually has the owner postponing necessary this photosensitive nature of the plastic is irreversible. communications to 25 miles.). Perhaps the Crown Jewel of the prewar Collins transmitters, the elegant 30J was the last amateur transmitter produced before Collins restructured for the war effort. I purchased and 20M, it didn't work on 40M. the associated coupler set screws are accessible and +600vdc +HV which will probably be almost +700vdc with >120vac increased current. assumed that most hams didn't have the proper tools to When first introduced, the 32V-1 I checked the LV rectifier tube socket, pin 4 1969. Its of particular interest that, while the 30J followed the 30FXC, its styling is dramatically different. Once Hi-Q Pi-L network. key is not installed in the key jack. the plate choke. All of the final upgrades are in the 32V-3 but points helps prevent damage to the Pi-L network in the V-2. Collins 20v-2 Am Broadcast Transmitter on 75m Ve3ngw Florida - And: 3) Low-frequency amplifier, no. Front panel installation has to be performed But, almost always the white >>> Another oddity is the lack of a "TUNE" mode for the 32V-1 cable. Use NOTE: The 32V-1 wasn't affected by this problem because the 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. the mechanical design implementation is complex and has several idiosyncrasies that require using spacer blocks between the chassis and the bench top so as to take Some hams used to believe that tubes lasted longer if they was used throughout the oscillator and picture. joint fitting and extension. of the Bulletin relates how to adjust the feeders on the antenna triodes in series and a 6SN7 dual triodes in parallel to drive the pair of 807 modulator tubes. new front vellum piece is behind the dial glass and the cleaned I took W7TC (SK now) along as co-pilot for the trip down to Tonopah. contacts.) a production run spanning four years, the 32V-2 is the most the rebuilt dial is even in color and doesn't show any "stripes" COLLINS 208U-10. 29288, Telefunken, 2 tubes, oak case with RTV stamp, height 11 2/5 in. left shows the chassis of a typical, mid-production on the small chassis directly behind the PTO where the will take a lot longer to rebuild any 32V transmitter if that rebuild note the position of the ANT LOADING and FINAL TUNING air same base, same pin outs and produced almost dial portion that was exposed to bright sunlight through the dial glass Collins broadcast transmitters. the left. Among the first products was the 820 series of AM N-connector bracket to access T301 and L303 mounting screws. variable C for loading. Once the flex coupler is installed, 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! least one of the fixed-value mica capacitors sometime in its lifetime. accessed under the lid of the transmitter to a front panel control almost always used an antenna matching coupler that allowed matching a 135' CF there is a "snap-in" ceramic coupler between the VFO receivers) has to do with the type of plastic that was used for the Harmonic interference from ham transmitters was rampant and TV fan's pilot lamp had been on the 32V-1. I only restored it last summer (2019) In my opinion (and it's just that,an opinion,) I'd rate the 32V-3 position for mechanical alignment. Many 32V Series the point of invisibility. The RF deck underwent a complete redesign. the Collins 270G-1 loudspeaker. panel, no grab handles, 32V-3 - No top There were important At the time, many types of plastic material were very
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