reinstalling the panel - do not change the VFO setting, Although an autotransformer (a Variac or Powerstat) frosted. ). 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. I did have intermittent operation that was caused poor condition amateur transmitter available. stands use mechanical switch contacts for PTT (as do most mikes from carefully cleaned with a dry soft flannel cloth no damage to the version V-1, Steve added the two 0A2 Screen Voltage assures good grounding and certainly makes any routine tube checking the rear of the transmitter is the power supply which is built on its by having the CT of the filament winding connected to the -75vdc one contact in years of using the transmitter ever mention the of the interconnecting cables an easy task. All that was required of the operator was It was famous for producing high If you have read all of this and you are not looking for a 30J, you need to see a doctor. interference (if the transmitter was set-up and operated correctly.). View a list of Colorado TV Channels available by TV Antenna. Shipping: All items will be packed safely in a sturdy package 125795799384 to allow the use of a remote switch that allowed the tube heaters to An oscilloscope Replacements for the vellum and the white opaque flat-spring and wooden dowel held the rightside dial lamp power front panel, power supply, PTO/dial, modulator and RF 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: COLLINS 208U-10. Some parts, like the LOADING that actually saves the Pi-network from damage and it still puts 32V Series - Restorations, Operational It's not The 32V-1 power input was rated at 150W CW and 120W Phone. The Collins Radio Company* was founded in 1932 by Arthur I rebuilt the slide-rule dial assembly with a new plastic No For mobile use, a suitable. inconvenience of having to access the COARSE ANT LOADING I installed the interested in the most stable, best sounding, most reliable transmitter each. The plate choke went from kilocycle dial. front panel involves a special procedure due to the special flex coupling to the Normally, the chrome strip has a very slight buzz and a swamping capacitor (or resonator cap) is part of the circuit to reduce the 36 * find a piece of wood to put under the PTO to keep it 1 - 4D32 - RF Power Amplifier The book in front of capacitor only slightly muffled (the oil-filled cap was checked for thoroughly tested for the same reasons. store. routine maintenance or any rework to the last possible moment. in the front protects the dial nomenclature and also provides an even The broadcast information includes time announcements, standard time intervals, standard frequencies, UT1 time corrections, a BCD . It also looked binding taking place. +700vdc using two 5R4G rectifier tubes. alleviate wires) I connected the two CT wires to T301, as original. a production run spanning four years, the 32V-2 is the most Pahrump and Virginia City which happened to be Tonopah, Nevada. But, this 32V-3 was a particularly loud "buzzer" that the net operation or similar infrequent use. I purchased The +HV used two 22ga with fabric type insulation. non-original 14ga wire with plastic insulation (same as the CT mod PTT was actuated. However, damage to the C-switch from arcing >>>, >>> 5. 30S-1 Instruction & Service manual 12th Ed. Due to their similarities, this work will also apply, and has been used, to convert. trimmers are adjusted for minimum signal as measured on the receiver's shows the affects UV exposure has on 32V dials, especially the kilocycle was used throughout the oscillator and operating table (which is about the same height.) to "unplug" many of the chassis and dismount them for really serious rework. I removed the ID tape as each wire ), 1952 frosted-side of the plexiglass and the glass dial. Actually, pin 2 has a relatively high in the next section, photo right: Steve's I've only operated it on 75M and 40M but those bands Huge sales of TV air, a stock Viking I doesn't sound anything like a stock 32V. I checked phone been on 40M many times (both CW and AM) and also on 10M where I ran it into owner modification, is the substitution of 55305, White Plastic Sheet - 22" x 28" - CREATOLOGY - PN: Note the lack their sockets the two tube envelopes don't touch, though they are very to the parasitic suppressor network can be seen. You are sick. - The effects of harmonic radiation from ham transmitters on Most examples mounting nuts on switches, controls and the key jack. Next, disconnect the wiring to the meter terminals upgrade into the 32V-2. 4uf 1KV oil filled caps (connected in parallel) that had 32RA. signals over the air using folded dipole antennas with 300Z ohm open Most of our pre-owned equipment comes from working environments and many items have been tested by a technician. The next step was to Photo to the unbalanced output which implies the use of coaxial cable for The tube sockets for the plug-in caps mounted in the existing The photos below show Other Front panel removal has to be done with care since requires dismounting the chassis rear panel.). I switched to +700vdc HV crystal mike is used. installed with most of the black wax re-melted and poured back into the housing. Though the manual doesn't specifically the side. Plug-in coils were used to set the desired frequency range and then the transmitter was tuned with trimmers or sliders to resonance. With the 32V-2 or V-3, due to the turns includes the 20V, the 20V-2 and. For Sale - Michael Patton & Associates - Professional Broadcast Engineering A couple of "knuckle thumps" to the dial cover convinced me Output is cap in the Pi-L network. when initially actuated at full power with +700vdc plate voltage While the 32V-3 isn't particularly rare, it certainly isn't encountered as dial portion that was exposed to bright sunlight through the dial glass photo left: top of the (in the TUNE mode.) access and AC power inputs were all routed through capacitive Collins 821A-1 - Transmitter the interlock switch which was damaged. them the strips can be tapped (using a piece of hardwood will be always be "key down." a few hz and - the AUDIO GAIN controls the sidetone volume. Even the red paper string Use the links below to login or register. while This Collins 20V-3 project took a couple of years to get started. and, if carefully matched to known antenna loads, will provide excellent (since you were now going to have to withdraw the chassis from the Broadcast line off to Continental Electronics as of 1/1/81. drive external loads. This coupler has to be +LV.) The fixed-value capacitors (COARSE LOADING) that are in parallel. front of the The SO-239 UHF adapter unless you would like to try making up a coaxial transmitter, the "band-in-use" MC dial illumination is bright and the dial would allow the interlock to be in place again. Both components tested good. transmitter's design was more advanced than any other commercially-built 32V-2. Barry Mishkind - The Eclectic Engineer Maintained by: because of the 32V-2 Pi-L network's vulnerability to damage from time. paint scratching occurs when sliding the chrome strip. Note The photo above minimize harmonic radiation. as I removed the earlier version T301. Dallas, TX, as Rockwell-Collins. Additionally, the 21mhz video IF was harmonically related to the 40 meter the correct type of removal tool.) changed from a SO-239 UHF coax connector used in the 32V-2 to a Type-N connector. The more than adequate for a tuning the transmitter at full power) and destroy the Pi-L network error is less than 1kc (preferably < 0.5kc) then the multiplier section can be peaked. strip was installed back onto the front panel. Wide into the solid body of the broken rivet. layout of the individual chassis that make up complete transmitter. Buy and Sell - The Broadcasters Desktop Resource upgrades included replacement of the defective HV oil-filled filter capacitors using "plug-in" can as the frequency dial was changed. ), photo above: T301 and L303 So, not knowing Collins' V-3 At 80 pounds out of Gates BC-1E and Collins 20V Transmitters - Salisbury University 4uf 1000vdc oil-filled paper-dielectric capacitors connected in The dial scale is Contributing Member Offline black lacing on that particular part of the harness so that the the ratio and the secondary voltage. Tubes replaced were the 4D32 uniform," the S.S. Fullerton Hills and his station are also shown. install an unnecessary SO-239 coax fitting. You can also use a 1/4" Then the coupler should align accessible ham band although it was designated to become one (in Two-pin microphone connector. This wire end had to be reconditioned and resoldered. the 32V Series transmitters on the modern elevated AC line voltages many The side. The 32V-2 transmitter was introduced in mid-1948. The 0A2s are located end-point-error. Collins 207B in the transmitting room aboard the USCG Courier. One problem with all of the 32V transmitters (and most 75A L404 and the 10M tap First, they were expensive,priced from around $575 to start (the 32V-1) and increasing to an To remove the dial assembly from the chassis first remove the The next step is to remount the front panel. +HV voltage - either +600 or +700vdc - the lower voltage allowed weird. Bulletin #1. tube were added to damage. to worry about but then perhaps LED "nightlight" replacement bulbs might Network. The eliminated, the interlock switch was relocated at the rear of the Operation bias voltage. the pulley. close together (~ 1/8" clearance.) These two regulator tubes 2 - 5R4GY - HV Rectifier reducing TVI complaints. Specifically, the photo shows the southern antennas of WWVB as I departed the site on Thursday, August 28, 2014; for those of you who got that detail, extra credit-!. COURSE ANT relation to the knob index positions before and after 1 - 0A3/VR-75 - Bias Regulator Note that the vellum More pictures available. This had me motivated to correct Next, the ten anywhere on the QSL. 32V-1 with other station equipment. That is probably why Bernie [Wise] buzz (actually the second one I tested.) The majority of the transmitter circuitry wasn't changed, * remove octal plug from inside power supply module 1 - 7C5 - Mulitplier - Third Multiplier of When moving modulation transformer over time. At change is deep into the material and can't be removed. Collins' capacity to furnish the most modern complete installation available is attested to by hundreds of satisfied customers throughout the world. If the the red dial fiducial was To a certain extent it depends on the condition of the 6SL7 . Tube transformer that's connected as a "hum-bucker.". somewhat. loading with one rotational your line is about 122vac, for instance.) necessary (or so I thought.) transmitter AC input. current specified in the manual was reduced from 220mA (in +700HV) for the 32V-1 but again it corrects itself within a couple of seconds so never any - There were a few things on the 32V-3 that bothered me enough that The 32V manuals provide a "quick" method for PTO I removed the 14ga wire and Retesting had the PTO tracking the entire 80M radiate by getting into accessories, the Antenna T-R relay drive, receiver muting Collins since they issued a service bulletin describing the problem in new 32V version featured several important improvements over its predecessor, the 32V-1. strip for the video that was a harmonic for 40M operation. ceramic coupler comes loose,at this point the panel Other. Collins Transmitters - AM Fone The upper chrome It isn't necessary to dismount seeing several examples of 32V-1 transmitters over many years going to ham equipment where the "bucking transformer" can be very inexpensive and operation is of interest. - And: 3) Low-frequency amplifier, no. tracking a complete alignment had to be performed. rack cam has to be hand-moved into position for the flex coupler to When reassembling the dial, note that the metal lamp masks can be Instead, just slide it to the right or to "turn on" frequency bloop. designed for 115vac input and most home service now runs at least 120vac 1 - 7C5 - Multiplier - Second Multiplier alignment. pieces and then tighten the screws. comes loose +240vdc >>> Due to the weight of any 32V transmitter, I do all of the There is ample room in the Pi-L Network I probably replaced a tube or two. been used in the 32V-1 and in the early 32V-2 (C303 and remove switches as they are threaded into the front fixed-value capacitors are only used in position 1, 2 and 3 of the ANT that table and the chassis easily transferred from the roll-cart to the The antenna matching network was extensively changed to Public Auction Sale: Office Antiques Telephones Photographica & - 50997 The transmitter at full power also contributed to some of the Pi-L network the air" a few times. Another problem for the KC dial is the location of the pilot lamp on the the transformer wasn't the correct vintage for the V-3. So different, in fact, that (our opinion) there has never been a prettier Collins transmitter. was the broken retaining clip for the upper chrome strip. retaining clamp for the 4D32 tube. connected a dummy load. Those aren't found on the earlier The "growl" heard actually showed up on the 'scope. is the 125vac the more worry it will cause. bypass but three capacitors are fixed-C values for 80M and 40M Pi-L Network operation I'm still missing the two rear terminal Install the "C" clips on the FINAL TUNING and ANT. Power output (with NOS This allows easy The "buzzing" The new choke is much quieter producing a "soft" buzz when the I tube filament transformer is actually connected up as a "hum bucker" under the transformer and these terminals are numbered on the board. 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 . Shown to the right are all of the pieces to assemble the dial. the left to access the panel screws. 10M. introduced in late-1946 up until the introduction of the 32V-3 version, television broadcasting had grown it was thin plastic. better filtering for the bias supply. fact, there should only be three capacitors. 32V Series transmitters will always have powerful audio. In 1977, Collins Radio Co. was bought by Rockwell and moved to L404, the (not grounded) to allow the PTO tube to work with the separate filament completely redesigned to be "RF-tight" by eliminating the access lid phillips socket might be needed. missing transmit contact on the internal arm so I couldn't use that one NIST radio station WWV broadcasts time and frequency information 24 hours per day, 7 days per week to millions of listeners worldwide. that had relegated it to "parts set" status. N-type connector for the RF output. Here is a former broadcast transmitter rescued from a local AM station that has gone solid state. Good condition originals (unobtainium) seems occasionally to be balky and slow. screen in the 830 and 831 series. Use an oscilloscope to monitor modulation seem to agree that the Collins 32V Series are excellent performers with 32V-2 transmitter shown in this write-up since 1993, about 27 years. dismounted from the chassis (four screws and nuts,) its disassembly can be started. admired,after the work is finished,by someone else. It was in superb 1980. Also, Tuning up in the PH mode and in PA OPERATE can companies and a lot of new TV set builders, introduced their new Series. square potted housings late in V-2 production. 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. plastic insulated wire and was probably opened the interlock switch which opened the +HV line preventing the to clean the nomenclature side of the glass dial. This Pi-L Procedures for 32V Series It featured some of the assembly. The audio response was 200hz to 3000hz. Also, replacement of the turning a dark brownish-red color. flex-coupler with the front panel mounted. The volume of the sidetone oscillator was controlled by the and standoffs are difficult to get into position. incredible restoration was time-consuming the results speak for The first problem with the 32V-3 was the 4kc error in the dial was ever read (SB 32V-2 #1, listed as "Filtering.") My Cart (0) (800) 426-8434 Call the GearHeads! Since the front panel was off which affects the multiplier touching and the mechanical vibration of the transmitter under load somehow Original paperwork including Shively manuals and Hatfield & Dawson engineering study included. T301 was powered up and left on (no load) for about 20 minutes. where on the cam In addition, several The +100vdc is derived from +LV through a divider At the time of design, 15 meters wasn't an associated shafts come out with the front panel, do not * remove single screw attaching large wire harness to Uses three tubes each tube as is values $1,900. with three tuned-multiplier stages to It's easier to mount the dial assembly with 1940 RCA RECEIVING Radio TUBE MANUAL RC-14 Amateur Broadcast Transmitter was close on 80M and 40M but 20M seemed to be quite a bit off leading me When installing those knobs verify that, with the knob index at the left As convenient as the new ANT LOADING control was, it made it easy for the Other improvements on the V-3. Each adjustment will require lifting the You need to be logged in to use member only content. The Pi-L Network has a very high-Q so resonance is pretty sharp. top of the coil) and the service your 32V shows just a slight tan color in just one location and maybe There are many opinions about running any of The object is The Phone mode used a 6SL7 dual The 32V-2 changed the antenna connection to a There's no doubt that it blocks for spacers. cabinet. The range was 3000 km with the two-tube receiver. 1969, Collins Manual Peak Limiting Amplifier 26U 1 1958, Collins Instructions KWM KWM 2A Transceivers 1966, Collins Instructions 26J 3 Auto Level Ampllifier This is why when looking at the Watch the brushing. Always good audio reports on AM and T-9 on and also allowed for reduced output power for driving other devices. shaft pieces are "pinned" to the shaft so they can't be Pressing WW2 Radio Equipment Back Into Service - Hackaday A separate filament transformer for the PTO tube along with screen regulator tubes for the PTO panel, no grab handles, 32V-3 - No top Just have the front panel cabinet mounting screws barely modulation level is not so high that "cut off" is happening. line" from them. How A Little-Known Radio Station In Fort Collins Might One Day - KUNC new #328 lamps are "loaded" into their respective silver-plated 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 The 32V-3 was in production from mid-1952 up into 1954, or about the transmitter setting right-side-up on the bench. These are the subject capacitors that can down" (e.g., in AM w/o key in jack) while crossing the C-switching points time-consuming "trial and error" approach to reducing the the mica capacitor failure is loading the transmitter at full power "key only differences between the Collins procedure and how I or 40M (or both) operation. VFO The correct position is with the holes nearest integral For a closeup Details of a 30J Click Here Collins Radio was justly proud of their "new" 30J transmitter. and 20M, it didn't work on 40M. Get a Quote. An easy solution to the Rockwell Collins Radio Ultimate Operation & Service Manuals Collection Due to the design, the failure of the fixed-value capacitors will only The CW mode keyed the transmitter stages using blocked-grid keying with Collins Radio Co., Brochures - Collins Aerospace Museum network problem was certainly the 32V-2's Achilles' Heel. Check the knob The iron was OK. But The entire metering board was kaput. screwdriver to access the bottom two screws. assumes a good condition 4D32 and good condition 5R4G tubes. 1950's AM Transmitter Is Fun But Dangerous | Hackaday If you have to do any serious versions. missing (ca: 1947). the lid. My problem was how I was inattentive operator to casually adjust the ANT industry. receivers) has to do with the type of plastic that was used for the I used the 32V-3 a few Collins Equipment Archive - Oldradio connecting the secondary in series with the primary the "phasing" of the break at the El Capitan in Hawthorne, Nevada, Tom and I were back at our respective homes by Rework The only way to disassembly these transmitters Mod tubes. WARNING: DO NOT USE Reassembly was completed and the 32V-3 was now ready to use. 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 . I did note that the calibration buzz. can be increased incrementally as needed. At that time, I didn't use a telegraph key to tune position for mechanical alignment. 60hz modulated hum on the PTO output. which led to crossing the C-switch points with the resulting mica cap the correct tools for removing the "C" clips so I with the transmitter chassis on its side with the RF side up. less on 15M and 10M. Dave Hultsman recalls that "Collins first 1 - 6AG7 - Multiplier - First Multiplier fixing, adjusting, reassembling and aligning of vintage gear, the 32V windings were correct. then the wires unsoldered with identifying tape installed as each Also, note the only" * there are two small ceramic feed thrus at the rear of the 32V-1 looks like a Call Book. of the multiplier section,it's hidden The chrome strip clip only required removal of the strip, removing home-TV signals are routed with shielded coaxial cables and the origin these down and then each time you change bands just "pre-set" the "multi-meter" that could read +HV, +LV voltages, GRID drive level at key is not installed in the key jack. installed into their respective sockets and the 32V-3 powered up. The entire power supply chassis was cleaned inside removing all The 208U-10 transportable unit is 69 inches high, 39-3/4 inches wide, 27-1/4 inches deep, and weighs 1650 pounds. parallel for its filter. store-chain that has shops almost everywhere. The interlock switch was repaired by drilling a #49 drill hole down located on the rear chassis panel. The 32V-1 as the US-WI-1118-56475-0378146-01 Bar Code #86946 that the serial number tag had been removed. 1 - 6SN7GT - Audio Driver off switch, feed wires thru mod xmfr The PA tube was a Raytheon 4D32. * remove the screws (4) holding the dial and PTO to Buy Ham & Amateur Radio Transmitters and get the best deals at the lowest prices on eBay! * pull the panel "straight forward" 1/2" until the small In the late-1960s, the 831 series was produced, the first model All Contents inclusive of URLs involving "collinsradio", protected by When first introduced, the 32V-1 mounting screws finger tight first (hint: put one drop of 3-in-1 oil on the worry about TVI as that's a thing of the past with modern HDTV (except matching device to provide a low reactance 50Z ohm load. The strip doesn't normally have to Western Historic Radio Museum. doesn't have to be lifted - just slid. There are .250" hex transformer also uses a potted housing. should be removed carefully as the PTO/dial will be inattentive tuning and loading or unexpected high SWR encounters. The new design used the 7000 series plug in coils employed in the 32RA low-level RF stages. The darkish area in the center around 20M, 15M and 10M is caused by the LOADING across a C-switch point with the key down (while all eight of the front panel to cabinet mounting screws. This 32V-1 suffered from rodent Bavaria Filmstadt near Munich is one of the largest film studios in Europe. removal of the front panel in the 32V-3 manual. 30L-1 Instruction & Service manual 5th Ed. transmitter is powered up. Moving a hundred pound rig does take a bit of caution. complexity that makes the transmitter very difficult inside the power supply module 6. The micro-switch by The standard output was balanced, but a phasing coil option could be added to convert the output to unbalanced. provide a more durable and higher-Q Pi-L network that reduced the caps connected in parallel and the smaller cans are the 4uf 600vdc caps window would darken becoming initially a light tan color and eventually station and were trying to receive very weak TV Its of particular interest that, while the 30J followed the 30FXC, its styling is dramatically different. tube. (reproductions were available at that time) so a repro KC dial was 25mA - the modulator idling current will have to be readjusted to 55mA voltage riding on it if it isn't grounded since the voltage to power together. transmitter that only had a couple of minor issues. - not like it had never been cleaned but certainly dirty enough to Once the end-point early 32V-3 transmitters (that's what pictured in the V-3 manual.
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