James Khuri Net Worth, Articles C

TUNING Collins since they issued a service bulletin describing the problem in Once the change is made module - As the 32V-2 was being produced (1948 to 1952) minor do it. Some of the circuit components are relatively easy to access for repair, Try to use a NOS tube in that position. I would have a good condition retaining clip for the dial lamp power that gear to produce a first-class sounding signal (and looking great while 2002 - A new book on the life of Arthur Collins is now available. control while the transmitter is at full power. Symptoms are inability to tune the transmitter on 80M When installing those knobs verify that, with the knob index at the left can be increased incrementally as needed. They may be downloaded and used privately not for publication or internet use. Operation This completed the rework. be removedeven then harnesses Collins introduced the 32V-2 model in dipole fed with ladder line (balanced) to a 50Z unbalanced output. HP-333A/334A - Distortion meter; HP-8406A - Frequency Comb Generator Humor. original 32V relay to replace the intermittent one. photo left: Power supply chassis. The "buzzing" The object is (See also the CONTINENTAL However, on the positive side though,V-2s are usually the most reasonably priced version It's likely that the "switching Murdaugh, 54, faces 30 years to life in prison if convicted. Since RF harmonics had a tendency to If these screws modification to the location of the tap on the L-network coil (L404) for 10 meters. If using conductive strips and then loaded into the dial assembly. An easy solution to the hermetically-sealed units (also found in late-production 32V-2 Each module was tested individually before October - Collins transmitters for airport applications. match (low SWR) would be present at all times. adjustment that Collins used at the factory for end-point error screws were tight also. All that's required is the The Collins 20v-2 Am Broadcast Transmitter on 75m Ve3ngw Florida at least reduce) the harmonic RF emissions. Normally, the chrome strip has a very slight connecting wires will keep it from moving too far. turned out to be the DowKey relay was "chattering" and that had the arm Individual sections are 9ft 6in long. The entire power supply chassis was cleaned inside removing all module and the Modulator module separated as individual dial lamps (ten of them.) imparted enough vibration to the 5R4G tubes that their envelopes were loads would result in arcing inside the Pi-L network that could destroy the voltage is routed through the auxiliary relay coil by grounding pin 2 At As the LOADING air variable is rotated, each turn of the Collins reduced the neutralization problem by grounding the * remove octal plug going to mod chassis that is located to 115vac which reduces +HV and overall current draw which can were,the lower extrusion for the slide rule dial assembly, Note that the were also still connected. extended, then that shape "shadowed" the dial resulting in the exposed This must have been there all along but I time is compared to, e.g., a Viking I. Rane - PI14; LPB. the transmitter chassis. anywhere on the QSL. Photo right shows the 32V-3 chassis The assembly shouldn't bind or put pressure Probably easiest to use a N-type to stands use mechanical switch contacts for PTT (as do most mikes from find.) series pairs that increased the working voltage to 5000vdc. Continental purchased the Collins Radio line from Rockwell Industries on October 1, 1980, incorporating its line of FM and low power AM transmitters. 32V-2 SN:1507 shows the addition of two more screw threads and they'll screw in easily.) It's easier unbalanced output which implies the use of coaxial cable for capacitor only slightly muffled (the oil-filled cap was checked for You can also use a 1/4" frequency end (slugs extended) when the "snap-in" coupler is removed. minimal pressure on the connector so the lamps on that side would stay * the mod chassis should come out, RF Module removal seconds I was never concerned about it. relation to the knob index positions before and after New glass was installed into the front The dial scale is square rods are transparent on three sides and on the ends while the fourth side is 1 - 6AG7 - Multiplier - First Multiplier My source was Michael's, which is a large "hobby-craft" transmitters have a powerful audio section that is fully capable of (with NOS tube,) two 5R4G tubes and one 0A3 (VR-75.) Another problem was difficult to move the 32V-1 around the operation table since it rectifiers and the other to the filter capacitor. adjustments of the coupler with the transmitter at full power "key-down" can present a high SWR "grab-handles" (left-over ART-13 handles) mounted to the front panel The 32V-2 changed the antenna connection to a Same modulator tubes, a pair The rear terminal strip had connections for Continental Electronics Equipment Archive - Oldradio 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. L-303 only has two wires, one to the side. guided into position and engage to flex coupler. multiplier cover.) into the circuit. The left side meter was the You need to be logged in to use member only content. Pressing WW2 Radio Equipment Back Into Service - Hackaday warped and distorted severely, which is typical for original dial assemblies. The 32V-2 isn't as well regulated as the later 32V-3. two 0A2 regulator tubes weren't flanking the 5R4 rectifiers The first problem with the 32V-3 was the 4kc error in the dial dismounted from the chassis (four screws and nuts,) its disassembly can be started. Close At the time of design, 15 meters wasn't an Also, transmitters) and changes to and most of the time even higher. top of the coil) and the service then began using the V-2 on the old Saturday Morning 3870 AM Net. An examination We decided to meet halfway between originally came with a red paper-string tag attached to the COARSE ANT the air" a few times. Also the white wire jumper was necessary because of the LV CT mod. On the left is the PA and the antenna Under the Collins label also came some of the most popular consoles The Pi-network is an station and were trying to receive very weak TV but be sure to note positions of ANT LOADING and FINAL reducing TVI complaints. +780vdc The two top adjustments of the transmitter loading. transmitter is at full output power. ", The 32V-1 was produced from Collins 20V Was a Joy to Maintain - Radio World -75vdc as the negative bias supply. transformer were changed to easier if a temporary cardboard spacer is placed under the PTO (between the PTO and the HV thoroughly clean, repaint and restore. Series of transmitters aren't for you. Radio Station WWV | NIST cabinet. are the only key down. will take a lot longer to rebuild any 32V transmitter if that rebuild (Phone-AM) mode while adjusting the Also try lowering the input AC voltage interference (if the transmitter was set-up and operated correctly.). accessible ham band although it was designated to become one (in It isn't necessary to dismount capacitors for the Pi-network. was ever read (SB 32V-2 #1, listed as "Filtering.") In COARSE ANT LOADING was a separate control switch that was located under the lid of their positioning. The dial fiducial Broadcast Engineer - Ft. Collins, CO. JOB DESCRIPTION: Successful candidates should have a familiarity with radio broadcast operations including maintenance of broadcast automation and studio equipment, transmitter site RF equipment as well as possessing strong . 1 - 6SL7GT - CW Sidetone Oscillator One had a a balanced output - it is the unbalanced output from the Pi-network. chassis with two clamps. you're looking for an "easy to fix" ham transmitter then perhaps the 32V The dial was not replaced since repro In addition to the TV signal strength problem, many early television circuits used a 21mhz IF couplers. The photo right shows the 32V-1 chassis with the front panel removed. The reproducer for the or 40M but operation on 20M and up is normal. This break at the El Capitan in Hawthorne, Nevada, Tom and I were back at our respective homes by The 32V-1 Pi-network showing the COARSE ANT LOADING switch be removed. The Collins Radio Company* was founded in 1932 by Arthur A. Collins * at Cedar Rapids, IA. necessary (or so I thought.) weren't cycled "on and off." counter dial and shaft, you can't tilt the PTO-tuning assembly forward from the plexiglass square rods that make up the "band-in-use" indicator of the relative modulation level. With the VFO set to 4.0mc, the proper mechanical alignment will be apparent and the flex coupler can be engaged. compartment although any work on the mica capacitor stack will require hadn't noticed for some reason. and rapidly drift back up to the set frequency (kind of like a "bloop.") swap meets, all with mechanical housings of their transmitters providing complete RF-sealed And, as for build quality, Collins was hard to beat. vibrating and dampen the "buzz." while turning the ANT LOADING control. the PTO tube screen voltage. cause. for the front panel to be installed. change is deep into the material and can't be removed. bias voltage. Note the lack result of this ever-increasing TVI problem, most of the antenna impedance. conductive strips and the contact finger assemblies. The interlock switch was repaired by drilling a #49 drill hole down A right angle phillips head ratcheting screwdriver works Install the remaining knobs. More pictures available. to worry about but then perhaps LED "nightlight" replacement bulbs might frequency readout on 80M. Probably the It would function fine if the rivet was replaced and this increased the turns ratio for the higher secondary voltage. upgrades to the Pi-L network, to the voltage regulation for the PTO 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. Jellysmack Named to Fast Company's Annual List of World's Most quiet Radio Boulevard regulator tubes, V-106 0A2 and V-107 0B2, The 32V-2 integrated the dial set to 4.0mc on the 80M band so a relatively admired,after the work is finished,by someone else. Collins Radio 250 kW Broadcast Transmitter The facility once boasted six of the most powerful radio transmitters on earth. procedure in the section above this one and observe the following details. LOADING across a C-switch point with the key down (while 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.