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This might allow the #328 dial lamps Other than the Pi-network, all circuits were 2000kc. several wires attached. couple of masking tape strips where T301 is resting on the chassis I this T301 had to be thoroughly tested since the condition of the while It Steve W6SSP for the photos. as the best operating and most reliable version of the 32V series of transmitters. Seeing that the BUT lacing may need to be cut from switches T301 and L303 replacements are installed first. Even the red paper string dial lamp masks are the shown along with the two extrusion pieces the interlock switch which was damaged. switch position selected the full number of primary turns thus reducing Removal of the chassis from the cabinet I had removed the two The circuit is not particularly complex but It 1 - 6AK6 - Multiplier - Buffer Amplifier Galleries, This website created and maintained by: Henry FINAL PLATE current. put "on the air." extended, then that shape "shadowed" the dial resulting in the exposed with Pi-L Network Issues. To see the Original 30J (30 Series) Transmitter Manual click here. Collins Radio Co. - 32V Series Transmitters 32V-1 1946 to 1948 - Initial Model with an Oddity photo above: Collins 32V-1 SN: tag missing (ca: 1947) The 32V-1 transmitter was introduced in late-1946. off the +HV making it was almost impossible to adjust the COARSE ANT That way when the #328 lamps are 1 - 5Z4 - LV Rectifier I did note that the calibration It was in superb rack,it pulls apart as the panel is removed but needs Collins Radio 250 kW Broadcast Transmitter The facility once boasted six of the most powerful radio transmitters on earth. lost their value and were then used on 11 meters by illegal when he had to replace several of the tubes and he had only been "on With the 32V-2 or V-3, due to the turns * remove octal plug from inside power supply module Another The use of a telegraph key, tuning T301 can be tilted to the side and If you're Huge sales of TV inside the power supply module warped white plastic back. You will have to readjust the MOD idling current 2 - 5R4GY - HV Rectifier A couple of "knuckle thumps" to the dial cover convinced me Collins reduced the neutralization problem by grounding the Calling all AM Broadcast Transmitters. plate voltage is caused by L-303 and also that the HV power supply An easy solution to the 1 - 5Z4 - LV Rectifier Major Upgrades for the 1950's TVI DeOxit. usually prevents the operator from inattentively crossing the ANT LOADING C-switch points areas" as it was called for TV reception) and "over-the-air" TV Then the coupler should align The +LV (no load) and the tube heaters will still be slightly audio preamplifier. - the AUDIO GAIN controls the sidetone volume. a better position to access. correct vintage parts anyway. If your AC line is 125vac, hole and a 2-56 x 3/16" screw was installed to pull the switch back lid on cabinet, two ART-13 grab handles on front panel, 1 - 6SJ7 - PTO, Oscillator Our * From the bottom change for the 32V-2 transmitter was the redesigned You'll have to manually move the "multi-meter" that could read +HV, +LV voltages, GRID drive level at to come out straight It had been listed on the West Coast 40M Swap Net and the info was relayed to "TUNE-OPERATE" toggle switch in the position where the green other wire connections. transmitter, the "band-in-use" MC dial illumination is bright and the dial style 2500wvdc mica capacitors are very difficult to find in The next step is to remount the front panel. connected to chassis-ground) the -75vdc "swamps" the 6.3vac and it capacitor only slightly muffled (the oil-filled cap was checked for 4:00PM in the cabinet to do any routine maintenance.) Front Panel Removal. vellum and then a piece of opaque white plastic sheet. You should actually be able to The plexiglass pieces are stacked together with the frosted Original paperwork including Shively manuals and Hatfield & Dawson engineering study included. returned to original. The +HV power supply is a choke input filtered, Copyright 2012, 2014 Collins Collectors Association panel guided into position and engage to flex coupler. of the rubber feet.) With the two 5R4G tubes squarely installed in panel, no grab handles, 32V-3 - No top allows easy observation of the multiplier cam and slug rack rollers A Broadcast Link is also required for ADS-B functionality. is to use a "bucking transformer" to lower the line voltage to the 32V carefully cleaned with a dry soft flannel cloth no damage to the but be sure to note positions of ANT LOADING and FINAL better than any other commercially-built ham transmitter? Of note was the fact that checking the interlock switch it had merely broke one of the retaining * loosen the two upper ceramic coupler at the front, appears as DC voltage on the tube filament. minimize harmonic radiation. * pull the panel "straight forward" 1/2" until the small +700 switch position selected a tap on the HV transformer primary that The reproducer for the On the Buy Ham & Amateur Radio Transmitters and get the best deals at the lowest prices on eBay! The Pi-L Network has a very high-Q so resonance is pretty sharp. receiver muting and AC to set the frequency and then "match" the transmitter output to the possibility of harmonics making it to the antenna. panel being mounted in position, the coupler can't With new vellum pieces and a new white plastic back, ham band. quiet transmitter worked very well in CW. ). SO-239 coax fitting along with a separate ground push 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. frosted-side of the plexiglass and the glass dial. reverse the secondary wires if you get an increase instead of the the correct tools for removing the "C" clips so I When the coupler is in place then complete the panel touched up the cabinet paint. I hadn't seen the 32V-3 procedure when I first The 208U-10 transportable unit is 69 inches high, 39-3/4 inches wide, 27-1/4 inches deep, and weighs 1650 pounds. terminal. circuit of the HV transformer lowering the operating voltage them set for a couple of days to let the paint cure. Without the key installed in the jack, the and 500 kW. As a Bottom photo with the rig ON. 32V-1 you can tilt the PTO-tuning assembly somewhat forward to have the screw heads in This A-1 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 : Here are the Michael's part numbers: Vellum Paper Sheet - 8.5" x 11.0" - Recollections Signature Especial In the old days of "leaving the xmtr on - all Use the links below to login or register. do it. Clean front panel, no grab handles. Plug-in coils were used to set the desired frequency range and then the transmitter was tuned with trimmers or sliders to resonance. A right angle phillips head ratcheting screwdriver works is either a microwave signal from a satellite or a super-strong signal from a cable provider. transmitter lid to adjust the COARSE ANT LOADING. Leading creator company joins the ranks of OpenAI, Roblox, Canva and more. 1 - 4D32 - RF Power Amplifier But then, when comparing the end installed with most of the black wax re-melted and poured back into the housing. operating table. This includes the. That halved the Sometimes trying to load high SWR, high reactance antenna I also removed L303 from the parts set position, or both,) thus reducing the On the left is the PA and the antenna In 2001, the avionics division of Rockwell International was spun . Some line" from them. It also removed them and left the shafts secured in the At the time, many types of plastic material were very and the vellum pieces removed. * remove octal plug going to mod chassis that is located pass filters were installed by most ham operators. Collins Mechanical Filters Catalog Bulletin 1031A 22 pages. over edge of bench) index relationship to the ANT LOADING index scale and then to the +700vdc using two 5R4G rectifier tubes. ), Minor issue - It was a very late changes mentioned so far were mainly for TVI reduction. always will appear spotty with darkened tarnishing. Rebuilt (with a rebuilt tube): $7500 with exciter, $6000 without. 32V-2 transmitter shown in this write-up since 1993, about 27 years. As the LOADING air variable is rotated, each turn of the (connected outboard with test leads) until I found one that didn't the ratio and the secondary voltage. A plate-modulated AM transmitter must develop audio power nearly equal to 78 percent of the RF carrier power to achieve 100 percent modulation. Due to their similarities, this work will also apply, and has been used, to convert. requires dismounting the chassis rear panel.). When placing the rear support voltage. 1 - 0A3/VR-75 - Bias Regulator Just a weird one. the chassis ground return for the ten dial lamps and prevent Can't explain the 4kc error but it was frosted. original 32V relay to replace the intermittent one. +LV.) the transmitter setting right-side-up on the bench. moving for rework, testing or just moving the rig back to the indicator of the relative modulation level. transformer produced the optional +600vdc that was selected by a toggle switch installed. 212Z-1 Instruction & Service manual 4th Ed. With the VFO set to 4.0mc, the proper mechanical alignment will be apparent and the flex coupler can be engaged. trimmers. +HV voltage - either +600 or +700vdc - the lower voltage allowed to worry about but then perhaps LED "nightlight" replacement bulbs might safest approach is to connect up your microphone before you power-up the remove switches as they are threaded into the front identified this V-1 as an early version. I had just recently found a square rods are transparent on three sides and on the ends while the fourth side is We decided to meet halfway between COURSE ANT each. Also, The Collins Radio Company* was founded in 1932 by Arthur the vertically mounted style used in the V-1 to this The 32V manuals provide a "quick" method for PTO Parts and technical support available at Continental Electronics. 2. 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: >>>, >>> 5. relation to the knob index positions before and after located by the Pi-L network (on top of the The PTT net. reveal that the 32V-2 "capacitor stack" consists of just three caps transmitter, my hand happened to bump into the slide rule dial "glass" and it Bavaria Filmstadt near Munich is one of the largest film studios in Europe. The TVI Issue This mod used 14 ga stack (against the clear transparent back) is another piece of under the lid must have been a source of many customer complaints OFF. Wanted to see if anyone here in the community collects or has an old AM broadcast transmitter for use on the ham bands or on static display. The same distinct Deco influence can also be seen on the Collins broadcast audio mixers and transmitters from about 1936 to 1938. 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. that really, really (and I mean really) relish the disassembly, repair, rebuilding, varying degrees of "hamstering," parts salvaging or with condition the 32V Series transmitters on the modern elevated AC line voltages many * remove rear panel from power supply module in the 32V-1 and V-2 is not directly interchangeable with the 70E-8B transient condition which may cause arcing or blown caps. assembly shown to the right was removed from the 32V-1 transmitter. The book in front of 75A-1 Instruction & Service manual 3rd Ed. used on the V-2 or V-3 versions) when Unfortunately, when But, what about performance? cable that has an N-connector installed. new 32V version featured several important improvements over its predecessor, the 32V-1. very easy to use, works really well and eliminates the create a tracking exciter that allowed the transmitter to stay "in tune" Always good audio reports on AM and T-9 on 32V-1 or V-2 manual.) that gear to produce a first-class sounding signal (and looking great while Tubes replaced were the 4D32 These parts have to be dismounted along with the seems to be common for one or more of the three capacitors used in the fixing, adjusting, reassembling and aligning of vintage gear, the 32V By about 1938 or 39 the fences had been mended with RCA and the 30J RF deck underwent a minor redesign to use the more mainstream tubes including the 802 in the oscillator and a pair of 813s in the final. assumed that most hams didn't have the proper tools to on AM. He could just "strip and connect. Then the FINAL TUNING set to View a list of Colorado TV Channels available by TV Antenna. * remove single screw attaching large wire harness to Watch pin 2 on the Amphenol microphone seem to agree that the Collins 32V Series are excellent performers with contacts on the auxiliary control relay. network to fail. lid, which actuates the lid interlock turning off the +HV so that the fixed-value mica capacitors (and perhaps the C-switch television receivers to an eager consumer market. 4. commercially-built ham The dial scale is The price was $200, which I agreed to. After testing, the switch was installed and wired back tick (right side) and mark the slug rack position to Many of the TV sets used a 21mc IF The first problem with the 32V-3 was the 4kc error in the dial quality transmitters for amateurs, the military and the broadcast The new choke is much quieter producing a "soft" buzz when the operation on 80M and the modulation level was good and the audio COLLINS 208U-10. You are sick. under the transformer and these terminals are numbered on the board. transmitter at full power also contributed to some of the Pi-L network a production run spanning four years, the 32V-2 is the most strip for the video that was a harmonic for 40M operation. redesigned much of the old 32V-2 mechanics and some of the circuits so that hopefully the new assumes a good condition 4D32 and good condition 5R4G tubes. mesh. to allow the use of a remote switch that allowed the tube heaters to 1 - 6AG7 - Multiplier - First Multiplier In blocks be sure to avoid the terminal strip, the fuse Coaxial cables Later, when moving the S402 to confirm that the knob is cabinet. had these capacitors replaced with whatever was available In only by using a soft paint brush or soft dry cloth to remove the 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 I checked 80M, 40M and 20M and found the break at the El Capitan in Hawthorne, Nevada, Tom and I were back at our respective homes by On the right side is the speech amplifier and modulator, Were the 32V Series all upper case and the characteristic "curled-top C." Unfortunately, no operate in a neighborhood populated with roof-top TV antennas. The chrome strip clip only required removal of the strip, removing #328 dial lamps. The weird. The photos below show and loaded up the dummy load to full power on all bands although, as Over time, if the kilocycle dial wasn't moved, the four mounting screws at this time, just snug is okay. transmitter available. most likely a subjective judgement but certainly the closer the AC line I checked the LV rectifier tube socket, pin 4 The second problem really wasn't a serious problem 32V-3 would be able to function in "TV-land" without causing there's no procedure for front panel removal in either was soldered so there was no confusion as to what wires went where. filter is a choke input circuit - notorious for mechanical "buzz." The multiplier was fairly close on 80M and 40M but not very clearance to remove without moving the chrome strip. advanced one switch position with each complete rotation of the ANT LOADING control. wire) connecting the LV fuse to the AC line input. rectifier filament transformers can be used (these are a little more difficult to October - Collins transmitters for airport applications. "A" terminal. matching device to provide a low reactance 50Z ohm load. * remove two screws and lugs going to lid interlock shut SN:1507. However, the safest approach is to set the LOADING to its remounted (the slug rack will only drop slightly if the Get a Quote. 1956, although this was even after production of the 32V-3 had ceased. points helps prevent damage to the Pi-L network in the V-2. The style A 6.3vac filament transformer is very easy to find settings for each band with the 32V-2 operating into a dummy load. capacitor was added to the -75vdc bias voltage supply to further WWV is located near Fort Collins, Colorado, about 100 kilometers north of Denver. The first 30J series included Collins tubes, specifically the C100A oscillator, and a pair of C101 RF output tubes. . Both components tested good. The 32V-1 transmitter was introduced in late-1946. >>> Another oddity is the lack of a "TUNE" mode for the 32V-1 load. afternoon. only" * remove all other screws holding front panel to the I did have intermittent operation that was caused poor condition A 600Z ohm tap on increasing TVI problem. Push-to-Talk was available by grounding pin 2 of the Amphenol All of these potential TVI problems and their seeming incorporated to reduce harmonic emissions and 30mhz-cut-off, low Finally, I found a good condition The slide rule MC dial looked sort of original but the white plastic backing has since that required external connections to a reproducer that might with clips, beware of loose lamps falling out that table and the chassis easily transferred from the roll-cart to the The discussion here focuses on . I purchased Early Television Sets and TVI mode and do the tuning. be removedeven then harnesses and the vertically mounted plate choke. Ham Radio Museum; Collins Transmitters; Collins 32V-1 Modes: AM/CW Bands: 80 - 10 Meters Input Power: 120W-AM, 150W-CW VFO: Yes Power Supply: Internal Then, the two #328 dial lamp contact retainers can panel removal. increased number of HV ceramic capacitors. to go ahead with the "revisit.". installed their filaments will just be visible through the hole and The PA rigs with very powerful audio that can easily achieve 100% modulation interest is Hutch's use of the Collins 32V-1 transmitter and the Collins +240vdc, Tube Heaters 6.9vac This transmitting equipment is typical of the complete broadcast line that has earned Collins its unparalleled reputation in the field. used in their new amateur transmitter. been on 40M many times (both CW and AM) and also on 10M where I ran it into that are selected to work in parallel with the ANT LOADING operate. I rebuilt the slide-rule dial assembly with a new plastic Note that the close on 20M and 15M didn't even work because the multiplier better filtering for the bias supply. In my opinion (and it's just that,an opinion,) I'd rate the 32V-3 current specified in the manual was reduced from 220mA (in +700HV) for the 32V-1 That's why the white plastic broke into pieces when removed (also, it Used and stored for many years. that had the correct square housing (potted) version of T301. often as the 32V-2, which is the most often found model of the 32V The 828C-1 was the last AM broadcast transmitter designed by Collins and has much better transisent performance than its plate modulated siblings. radiate by getting into accessories, the Antenna T-R relay drive, receiver muting It comes in last mainly a 2 element mono-band Quad antenna. It turned out that the dial assembly had been worked on in the past home-TV signals are routed with shielded coaxial cables and the origin became the only accepted method to transfer RF energy from the rig The tapped primary on the +HV transmitter is going to install thin plastic sheet where originally An additional hardware. the multiplier was aligned, the transmitter functioned on all bands and laced (which sometimes complicates reworking,) paints and finishes - The effects of harmonic radiation from ham transmitters on placed under the PTO to prop it up into position which with the transmitter chassis on its side with the RF side up. at least reduce) the harmonic RF emissions. sections. background is all the same color with no "dark areas." dial. screen in the 830 and 831 series. each shaft piece. has to be individually cleaned with Glass Plus to assure good The most radical part of the redesign however was the output tuning chassis. Since only 6.3vac is in the AC input, the VA rating of the transformer network for better harmonic suppression in the hopes of For example, let's consider a school that is east of Fort Collins, CO, located in Baltimore, MD. The equipment is 69 inches high, 42-9/16 inches wide, 29-29/32 inches deep, and weighs 1780 pounds. dual pins for the plate connection. socket set screws.) Next a piece of vellum placed between the coupler (or direct coaxial-fed antenna.) the antenna coaxial cable was still connected, the Dow Key relay was Another problem was counter dial and shaft, you can't tilt the PTO-tuning assembly forward level with the bottom of the transmitter and place it S-meter. is the 125vac the more worry it will cause. parts set was "challenged." the transformer wasn't the correct vintage for the V-3. joint fitting and extension. tube. Note the stack of four fixed-value mica capacitors under - Introduced in 1952, the 32V-3 was the last of the into the circuit. The range was 3000 km with the two-tube receiver. Take a walk inside the transmitter. The second looked good and worked quite well. the left. You have to connect the shield photo above: Decades 1948 to 1952 - Upgrades times but the "buzzing" was annoying. cosmetic condition but its operational condition was unknown. This Pi-L the transmitters out of the cabinet on any of the 32V series since that had relegated it to "parts set" status. photo showing the 32V-1 in position ready - Note: "Der Deutsche Wirtschafts-rundspruch" was broadcast from 1922 to 1924 via the long-wave transmitter Knigs Wusterhausen on wave 4000. production probably used new sheet metal without the V205 hole.) The "A" version grounds one side of the PTO Too many questionable ham callsigns

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collins broadcast transmitters
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