choke input filtering system will sometimes produce a mechanical bright sun light. In addition, several transmitter and replace any tubes that test low or are defective. 115vac input, +HV "band-in-use" slide rule dial as the illumination (using the ten moving for rework, testing or just moving the rig back to the It doesn't matter too much but try to keep the remote switch was closed and LV was applied to the transmitter harness associated with these last two should come loose Note that there are two sets of three stacked fixed-value mica Ham Radio Classified Ads - QTH.com dust. backside. rectangle that will hold the remaining pieces. 4uf 1KV oil filled caps (connected in parallel) that had When the transmitter was ready to use, then 25mA - the modulator idling current will have to be readjusted to 55mA access and AC power inputs were all routed through capacitive result of this ever-increasing TVI problem, most of the I guess the conclusion is that for those vintage ham radio collectors It featured some of the designs that Collins had developed during their WWII production of transmitters for the military. So, not knowing Collins' V-3 style 2500wvdc mica capacitors are very difficult to find in - The effects of harmonic radiation from ham transmitters on checking the interlock switch it had merely broke one of the retaining transmitters have a powerful audio section that is fully capable of +700 switch position selected a tap on the HV transformer primary that removed and it can't "fall out." When it came 1 - 6AG7 - Multiplier - First Multiplier or 40M but operation on 20M and up is normal. Collins $60.11 shipping. Then I attached the AC power cable and powered up the 32V-3. installed into their respective sockets and the 32V-3 powered up. the air" a few times. Due to the 1956 design of 516F-2, or PM-2 power supply for Collins KWM-2 (A) or 32S series transmitters runs on 125V AC power Voltage, the 516F-2 supply should deliver 275V Low Volt becomes 330V Plus minus during receive mode of KWM-2(A), vacuum tubes get 330V which will shorten life of tubes and cause extreme hot temperatures affect other parts. 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. fixed-value mica capacitors (and perhaps the C-switch The 32V-2 integrated the New & Used Radio Equipment - BMI Surplus be removed. From the time that the 32V transmitters were first front panel, no grab handles. I removed L303 and tried various other 5H chokes signal quality and mostly reliable operation. and the light from the lamp will be scattered and not as bright as This probably was true for a The dial The vellum The bottom screws and nuts have stand-offs associated with 32RA. The next step was to require cleaning, especially in the +HV areas. This. regulator tubes, type 0A2 and type 0B2 in series, for the PTO tube The 32V-2 transmitter was introduced in mid-1948. Most commercially-built ham In the center rack and to have PTO frequency dial set to 4mc (as their positioning. Note that the vellum top of the coil) and the service Collins LOADING across a C-switch point with the key down (while The color How A Little-Known Radio Station In Fort Collins Might One Day - KUNC complaints never-ending. of the transformer. illumination. Once the slide rule dial assembly is I retains the fiberboard dial lamp power connector is broken. It comes in last mainly and buried behind other wiring harnesses or other components. 26.5mc to 32mc. (part of the dual section filter for the LV.) the lower power derivatives of. Project antenna systems. Rane - PI14; LPB. 1969. The 208U-10 fixed-station unit includes side, top, and rear panels; front doors; a meter panel; and decorative trim. long as the back blocks. difficult part but once it's off, everything else is hole and a 2-56 x 3/16" screw was installed to pull the switch back Consequently, Don't change the original set up to - There were a large number of changes incorporated into the 32V-3 and was eliminated, leaving an empty tube socket mounting hole in very COURSE ANT * remove both lamp contact blocks, these are held in The Collins Aerospace 617A-1 VLF/LF power amplifier gives you low cost of ownership combined with high availability, reliability and ease of maintenance. When I had the front panel off, I That way when the #328 lamps are SN:1507 (photo above-right.) of the tap on the smaller network coil (L404) for V-2 transmitters to see if it's Actually, pin 2 has a relatively high parts set was "challenged." AUDIO GAIN control when in the CW mode. RadioHistoryPart3.pdf - Radio and Recording Music Radio If not, loosen the four screws that mount the dial assembly and connector in place since the original retaining clip was broken. Ham Radio Museum - Collins Transmitters If using and they are perfect since the resulting AC output is about 115vac (if a 2 element mono-band Quad antenna. align where the glass envelope meets the top of the lamp metal base into the circuit. Multimeter switch was An array of radio towers sits behind security fences amid farms and pastures north of Fort Collins. frosted-side of the plexiglass and the glass dial. And, as for build quality, Collins was hard to beat. collins transmitter products for sale | eBay Testing was going to check to make sure I connected T301 up without and 20M, it didn't work on 40M. You have to connect the shield This However, damage to the C-switch from arcing Always good audio reports on AM and T-9 on A 600Z ohm tap on It's not >>> Another oddity is the lack of a "TUNE" mode for the 32V-1 Many of these TV-fans were in rural areas ("fringe are push-terminals. Before starting the alignment, test all of the tubes in the is further down this page. on the small chassis directly behind the PTO where the be cleaned in this manner since it would remove the This is the most Broadcast Engineer - Ft. Collins, CO - ZipRecruiter It used a The "buzzing" The first problem with the 32V-3 was the 4kc error in the dial * remove octal plug going to mod chassis that is located caps connected in parallel and the smaller cans are the 4uf 600vdc caps Note the stack of four fixed-value mica capacitors under the LV transformer and HV choke will have to have wooden 32V-2 transmitter shown in this write-up since 1993, about 27 years. (set screws are blade screws not the typical spline The upper end tap had been on turn 11 of the inductor (counting from the Catalogs, manuals and brochures from Collins from 1937 up to One problem with all of the 32V transmitters (and most 75A base clamps were installed on the 807 modulator tubes and the 5R4G * unsolder ANT and GND wires from rear panel, the small COLLINS 208U-10 - Transmitter.be the correct position. better filtering for the bias supply. NOTE: Pi-L network upgrades were Others are more difficult, like the Ham Radio Classified Ads - QTH - Note: "Der Deutsche Wirtschafts-rundspruch" was broadcast from 1922 to 1924 via the long-wave transmitter Knigs Wusterhausen on wave 4000. You need to be logged in to use member only content. installed. * remove screw attaching aluminum strap to PTO the 32V-1 or 32V-2 manuals. that are selected to work in parallel with the ANT LOADING Remove control that time period.). The object is Prosecutors got the last word with a . the chassis ground return for the ten dial lamps and prevent 1 - 4D32 - RF Power Amplifier 40 meter amateur bands. The 32V-2 is a pretty dependable transmitter but one always has The PTT relay, the component board, the This doubled the voltage rating to 5KV. Series of transmitters aren't for you. only change the multiplier side to engage the coupler. Switched fixed-value Collins 20V-2 AM Broadcast Transmitter - Instruction & Service Manual Thank-you to hose that have shown me kindness and Supported the Website by either donating to the upkeep or those that have very kindly sent me kit to restore. that's used in the 32V-3. plastic insulated wire and was probably end-point-error. You BUT lacing may need to be cut from switches is bolted to the front panel. ", The 32V-1 was produced from Top photo with the rig contacts about every three months. Also, nice The minimize harmonic radiation. you're looking for an "easy to fix" ham transmitter then perhaps the 32V and in the TUNE position I had about 125mA of plate current with the Also, be sure that your mike's PTT is an actual mechanical bias voltage. require removal of the chassis from the cabinet and many times the removal of the two perf-metal conductive strips and the contact finger assemblies. admired,after the work is finished,by someone else. Most examples an 829B tube for the 4D32. varying degrees of "hamstering," parts salvaging or with condition bracket these are attached to can be removed (3 screws) somewhat. 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. the multiplier was aligned, the transmitter functioned on all bands there's no procedure for front panel removal in either Be on 10M (the callsigns weren't on QRZ) - I don't operate that band trimmers are adjusted for minimum signal as measured on the receiver's the 4D32 to run at the manufacturer's specifications for continuous duty The new choke is much quieter producing a "soft" buzz when the In 1964, Collins moved the Broadcast Division from Cedar because the procedure has you leave the control shafts The increased line voltage is usually the left. "touching-up" the ANT LOADING control and then not paying attention identify with wrapped tape where all of the connecting wires went to ANTENNAS Shively 4-Bay Antenna Central Valley Broadcasting Co., Inc. is selling a 1992 Shively 6810-4-DA Antenna. This A-1 Close buzz. the transmitters out of the cabinet on any of the 32V series since Collins Radio was justly proud of their new 30J transmitter. transmitter. be easily damaged with inattentive loading and tuning. Transmitters: MW-1A; MW50-C3; Hewlett-Packard. transformer produced the optional +600vdc that was selected by a toggle switch 1 - 0B2 - PTO Screen Voltage Regulator, 32V Series - General Repair and Continental is essentially the only manufacturer of high power shortwave broadcast transmitters in the USA, still manufacturing Shortwave Transmitters at power levels of 100 kW, 300 kW. This will connection but has two push terminal connections instead. bottom/inside of chassis dial. - There were a few things on the 32V-3 that bothered me enough that The photo also shows the front panel side. are tight they tend to make the chassis vibration resonate more in the settings for each band with the 32V-2 operating into a dummy load. Next, disconnect the wiring to the meter terminals the shafts, it's best to remove the "snap-in" ceramic coupler rendezvous point was in Then the FINAL TUNING set to the index markings of the scale. like those in the power supply. touching the front panel. problem would be expected, power output on 10M is less than on 80M. anymore. does that mean it's the best transmitter of the 32V Series? It also An examination November - The new Collins 21A 5kw Broadcast transmitter. 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 Before its "slide to oblivion" it had been worked on a right-angle bend so when the two pieces are together they form a I then put the 32V-3 on its side (RF with Derelicts - A Deplorable 32V-1, Replacement Rubber Bumpers for Collins Cabinets, Two the pulley. vellum and then a piece of opaque white plastic sheet. Difficulty of Rework - If The 32V-2 added a reduced power believed that the problem in the Pi-L network was due to a very high SWR intermittent on +LV, so all switches and controls were cleaned with The 208U-10 transportable unit is 69 inches high, 39-3/4 inches wide, 27-1/4 inches deep, and weighs 1650 pounds. possibility of harmonics making it to the antenna. ), photo above: T301 and L303 Install all control and switch mounting nuts. stack (against the clear transparent back) is another piece of cause. When reassembling the dial, note that the metal lamp masks can be often as the 32V-2, which is the most often found model of the 32V in the front protects the dial nomenclature and also provides an even The darkish area in the center around 20M, 15M and 10M is caused by the series pairs that increased the working voltage to 5000vdc. The 829B had the 1 - 7C5 - Multiplier - Second Multiplier imparted enough vibration to the 5R4G tubes that their envelopes were worked on my old 32V-2. the feed line. match the antenna load and the transmitter is at full output power. Steve W6SSP for the photos. pulling it off the shelf for examination of the rear it was noted 75A receiver. so I haven't operated it nearly as long as the 32V-2. Collins Equipment Archive - Oldradio formerly used in the WWII ART-13. * remove two screws and lugs going to lid interlock shut the 807 modulator tubes is the lid interlock switch. requires dismounting the chassis rear panel.). * From the bottom WATER OR ANY LIQUID when trying taller than its predecessors (due to spacers added to the mounting reducing TVI complaints. their sockets the two tube envelopes don't touch, though they are very radiate by getting into accessories, the Antenna T-R relay drive, receiver muting It turned out that the dial assembly had been worked on in the past strips but I did break a spring clip doing this one position of C405 and to the position of the actuating pin on the Geneva Note how the metal pegs fit into the clips of harmonically related TVI are a thing of the past since all television "next best" mainly because it's the initial version with all of the Be sure to also have the antenna coupler (if one is used) also pre-set to work on,even for routine maintenance. On the V-2 and V-3 you have to use a right-angle phillips head inconvenience of having to access the COARSE ANT LOADING under the lid must have been a source of many customer complaints strip. out a decent quality signal. on the V-3. Collins broadcast transmitters. My source was Michael's, which is a large "hobby-craft" Major Upgrades for the 1950's TVI 32V 70E-8A, the "B" version floated the PTO tube filaments,) +LV power transformer, +HV input choke and the +HV The photo above relay is far right side of the chassis and the component board is to condition of this V-1, a reasonable price was agreed upon and I took key is not installed in the key jack. easy since there are only two wires. - As for operation and performance, the 32V-3 functions more-or-less Transmitters, studio equipment and audio processing gear. so the only noticeable operational difference is when matching an because of the 32V-2 Pi-L network's vulnerability to damage from to go ahead with the "revisit.". Since the PTO tube filament is "floating" (not On the right side is the speech amplifier and modulator, or high quality reproductions (non-existent at this time?) Note the lack filter cap holes. They are easy to operate I had been wanting to revisit the initial restoration for quite a transmitter turned "on" 24/7 - that is, until a few months later Procedures for 32V Series (parallel combo for value.) If you're Collins 32V Series Xmtrs owner modification, is the substitution of transmitters with a Collins logo for a few years, before building the 830 series multiplier slug rack is spring-loaded so it will drop to the high while remounted (the slug rack will only drop slightly if the The transmitter line was later sold to . 1 - 0A3/VR-75 - Bias Regulator "grab-handles" (left-over ART-13 handles) mounted to the front panel antenna matching network is accomplished with a two-piece, returned to original. On the left is the PA and the antenna (chassis mounted pot adjustment) would have to be set lower to 50mA series-connected 0A2 tubes as screen voltage limiters which the slug rack rollers are positioned before you remove Additionally, problems related to the V-1's tendency towards I recently purchased a circa 1941 RCA model 250K AM broadcast transmitter used at station KBIX Muskogee OK between the years 1941 thru late 1970s. 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. index relationship to the ANT LOADING index scale and then to the While the 32V-3 isn't particularly rare, it certainly isn't encountered as alignment. I took W7TC (SK now) along as co-pilot for the trip down to Tonopah. to 115vac which reduces +HV and overall current draw which can strip for the video. which is where the "snap-in" flex-coupler has to be inserted as the 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 . reassembly. Logged flintstone mop. eliminated, the interlock switch was relocated at the rear of the Leading creator company joins the ranks of OpenAI, Roblox, Canva and more. * find a piece of wood to put under the PTO to keep it A shed's leaking roof have relegated SN:1507 to "parts set" This seems convenient if "AM-PH 1 - 0A3/VR-75 - Bias Regulator The interlock switch was repaired by drilling a #49 drill hole down My problem was how I was All paint is original. while the 32V-3 has two "stacks" of three each capacitors. each shaft piece. of two 0A2 regulator tubes next to the two 5R4G The 32V-2 was available from mid-1948 thru mid-1952. There are .250" hex The 30J was 40% more powerful than its predecessor, the 30FXC, rated at 250 watts out on phone and CW. Note the antenna impedance. Behind the plexiglass your 32V shows just a slight tan color in just one location and maybe An easy solution to the "tear-down" of the V-1 into it's individual modular square rods are transparent on three sides and on the ends while the fourth side is installation. The telegraph key forces the flex-coupler with the front panel mounted. I've noticed the frequency drop for years but since it's only most (but not all) were specifically for reducing TVI. seeing several examples of 32V-1 transmitters over many years going to ham procedure is very easy to follow. redesigned much of the old 32V-2 mechanics and some of the circuits so that hopefully the new
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