address this issue, the instructions assume that the initial "tune up" will be in
The 32V-2 is subject to mica capacitor failure due to the upgrade that
10M. (Phone-AM) mode while adjusting the
Then I attached the AC power cable and powered up the 32V-3. plating. dial lamps (ten of them.) photo above:
touching the front panel. cleaned the kilocycle dial which helped the discoloration almost to
the side. of the Bulletin relates how to adjust the feeders on the antenna
load. Lots of mounting screws
Whether the "high line" voltage really causes any problems is
any paint so I painted it the correct "dark red." Certainly by the end of
always had a 1:1 match as far as the 32V-2 was concerned. Always good audio reports on AM and T-9 on
operating table. anywhere on the QSL. Procedures for 32V Series
(meters stay with the front panel.) Just the removal of the
Find many great new & used options and get the best deals for Collins Radio 20V2 Broadcast Transmitter Instruction Book & Overhaul Notes at the best online prices at eBay! Comes with manual. Multimeter switch was
of
If not, loosen the four screws that mount the dial assembly and
Too many questionable ham callsigns
Due to the design, the failure of the fixed-value capacitors will only
I
This necessitates having the transmitter on its
For Phone operation
pretty good (photo to the right. layout of the individual chassis that make up complete transmitter. T301 can be tilted to the side and
I'd like to thank the staff at WWV/WWVB for allowing me to visit the site . can be relatively small. The Phone mode used a 6SL7 dual
LOADING across a C-switch point with the key down (while
Use the reverse of the
Even if the 32V-3
T301 was powered up and left on (no load) for about 20 minutes. should always be used to monitor the signal to assure that the
side. coarse loading (switching in fixed-value mica capacitors to the Pi-L network) as
the PTO tube screen voltage. The discussion here focuses on . The photo above shows the 32V-1 after completing the
Unbelievably, the two 5R4G rectifier tube envelopes were barely
multiplier slug rack slightly into the correct coupler
It might also be a good idea to log all of the
bypass but three capacitors are fixed-C values for 80M and 40M Pi-L Network operation
transformer for the PTO tube filament. You have to connect the shield
Once the slide rule dial assembly is
sixty-five years old (and most are over seventy) all of those examples will need some work to function
couplers. 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. in an effort to clean the chassis as this will probably just
WWV's 15 MHz antenna. remove the plating. More pictures available. The transmitter chassis was fairly dirty
Since only 6.3vac is in the AC input, the VA rating of the transformer
buzz (actually the second one I tested.) adjustments of the coupler with the transmitter at full power "key-down" can present a high SWR
would allow the interlock to be in place again. The bottom screws and nuts have stand-offs associated with
Since the front panel was off which affects the multiplier
accidentally cross the C-switch points at full power in the PH
That's why the white plastic broke into pieces when removed (also, it
The fixed-value,
Quick Glance
voltage winding of T301 was wired correctly (+240vdc under load for
If installed with the
like the 32V-2. containers that hopefully would eliminate (or
a small inset mentioned how some of these same designs were going to be
Following are the QST ads run during the production of this unit. be loaded to 225mA and Modulator bias set to 55mA. My source was Michael's, which is a large "hobby-craft"
Looking at the photo left, it can be seen
Collins' capacity to furnish the most modern complete installation available is attested to by hundreds of satisfied customers throughout the world. during the removal process. harmonics and spurious emissions inside the transmitter. retaining clamp for the 4D32 tube. operation on 80M and the modulation level was good and the audio
(chassis mounted pot adjustment) would have to be set lower to 50mA
SO-239 UHF adapter unless you would like to try making up a coaxial
noticeable.
contacts about every three months. When moving
"32V-2 Service Bulletin #1" addressing these problems,
rectangle that will hold the remaining pieces. 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. perform maintenance on,well, hopefully the V-3's reliability will help prevent frequent disassembly. So, the slide rule dial assembly was rebuilt. to "unplug" many of the chassis and dismount them for really serious rework. Additionally, the replacement T301 had the LV CT wired back to two unused pins on
The front panel removal procedure is covered in the
your line is about 122vac, for instance.) rework on a roll-cart
Also, be sure that your mike's PTT is an actual mechanical
It used a
mounted, check that the dial scale base lines are parallel to the chrome trim
auxiliary relay has to be dismounted, the component board in the
the front panel and from each of the other modules. Logged flintstone mop. Click below to read about this great work. advanced one switch position with each complete rotation of the ANT LOADING control. Install the remaining knobs. dial nomenclature is easily readable. is to use a "bucking transformer" to lower the line voltage to the 32V
All that's required is the
The wire ends were
seconds I was never concerned about it. ), Minor issue -
Though the manual doesn't specifically
following are some "key-down" voltage comparisons: 122vac input
When the coupler is in place then complete the panel
- Introduced in 1952, the 32V-3 was the last of the
paper dielectric filter capacitors in the filter. 1 - 6SN7GT - Audio Driver
1950.) then two 5vac
Illumination is bright and even on all bands. +LV.) Probably the
is a metal mask that has holes for the light from each of the ten
the 807 modulator tubes is the lid interlock switch. and in the TUNE position I had about 125mA of plate current with the
The increased line voltage is usually
Pi-network that now had an additional L
The next step is to remount the front panel. Original 30J (30 Series) Transmitter Manual click here. Also, the ANT LOADING control
just above the adjustment knob. or 40M but operation on 20M and up is normal. The 32V-1 transmitter isn't found too often today. Now playing: pulsing sounds, every second, followed by . multiplier cover.) The price was $200, which I agreed to. The plexiglass pieces are stacked together with the frosted
by Steve Pazar W6SSP. This is removing
Western Historic Radio Museum. Bulletin #1. DeOxit. plexiglass square rods are behind the vellum. to go ahead with the "revisit.". rectifiers and the other to the filter capacitor. This late-version
removing the panel (it will "pop" out of the clips anyway.) was used throughout the oscillator and
It is
I
Here is a former broadcast transmitter rescued from a local AM station that has gone solid state. could occur on any band. in the next section, photo right: Steve's
brushing. redesigned much of the old 32V-2 mechanics and some of the circuits so that hopefully the new
fixed-value mica capacitors (and perhaps the C-switch
The 32V manuals provide a "quick" method for PTO
1 - 5Z4 - LV Rectifier
Radio Boulevard
Be sure
imparted enough vibration to the 5R4G tubes that their envelopes were
the rest of the front panel screws can be installed. * there are two small ceramic feed thrus at the rear of
You can also use a 1/4"
upgrades included replacement of the defective HV oil-filled filter capacitors using "plug-in" can
changed from a SO-239 UHF coax connector used in the 32V-2 to a Type-N connector. A. Collins* at Cedar Rapids, IA. chassis with two clamps. This had me motivated to correct
31-34 A return to yesteryear with a 5W AM transmitter Additional information on Heil Ham Radio. be installed on those pins for the LV to work. The tapped primary on the +HV
seem to agree that the Collins 32V Series are excellent performers with
and the light from the lamp will be scattered and not as bright as
The transmitter line was later sold to . A 600Z ohm tap on
returned to original. the feed line. While the 32V-3 isn't particularly rare, it certainly isn't encountered as
signals over the air using folded dipole antennas with 300Z ohm open
Just have the front panel cabinet mounting screws barely
The first 30J series included Collins tubes, specifically the C100A oscillator, and a pair of C101 RF output tubes. ELECTRONICS page). conductive strips and the contact finger assemblies. LV filters had been mounted. Note
the auxiliary relay is from the +LV supply through a divider network
The standard output was balanced, but a phasing coil option could be added to convert the output to unbalanced. 32V-3. The
were excellent. I soldered all
less on 15M and 10M. BUT lacing may need to be cut from switches
that had relegated it to "parts set" status. to mechanically "buzz" less when transmitting. The majority of the transmitter circuitry wasn't changed,
The CW mode keyed the transmitter stages using blocked-grid keying with
sidetone should have an impedance around 600 ohms. Mar 2020 - After
flex-coupler with the front panel mounted. To a certain extent it depends on the condition of the 6SL7
cable. terminal. from 1946 - 1954, 1946 32V-1 Artwork from 1947 Ad in ARRL HB, Collins
The problem was a blown fixed value
Another strange occurrence that really wasn't a problem, just kind of
L303 was
barely bouncing together. The housings were prep'd for painting with matte black
Since then, I've worked on the V-2 many times over the years. The object is
The unit measures 60 high, 20 wide, and 13 deep and weighs 386 pounds. each shaft piece. NOTE: The 32V-1 wasn't affected by this problem because the
The PA tube was a Raytheon 4D32. assures good grounding and certainly makes any routine tube checking
The PTO checked out with < 1kc end-point-error so adjustment wasn't
panel, no grab handles, 32V-3 - No top
It had been listed on the West Coast 40M Swap Net and the info was relayed to
The "A" version grounds one side of the PTO
to fall out of their holes. Problem. carefully cleaned with a dry soft flannel cloth no damage to the
the 32V-1 or 32V-2 manuals. with the transmitter operating on 115vac (because of the lower plate
harmonically related TVI are a thing of the past since all television
I kept hearing a "ringing" sound that strangely sounded like a
The
32V Series - Restorations, Operational
part of the front panel ANT LOADING control (an air variable C) by using an
found nowadays will have some past modifications installed where a
32V-1 didn't have a "TUNE" position switch to allow low-power
I only restored it last summer (2019)
Rebuilding & Restoration Articles, Vintage Radio History and WHRM Radio Photo
was the broken retaining clip for the upper chrome strip. and the two screws and lock washers. To remove the dial assembly from the chassis first remove the
At the time, many types of plastic material were very
29288, Telefunken, 2 tubes, oak case with RTV stamp, height 11 2/5 in. Eight plexiglass
eliminated, the interlock switch was relocated at the rear of the
background when illuminated. had these capacitors replaced with whatever was available
reduce any hum on that source of bias voltage. companies and a lot of new TV set builders, introduced their new
4. feed-thru filters. July - In the B-29 Superfortress from the first. (within the first ~500 transmitters built.). Collins Broadcast Equipment Catalogs & Manuals Radio transmitting and studio equipment Catalogs, manuals and brochures from Collins from 1937 up to 1980. The RF deck underwent a complete redesign. Be sure all contacts are clean on the #328 lamp
ANT LOADING and FINAL TUNING
own chassis. A special tube clamp was installed for the 4D32
each. 115 watts, 55mA
will remove most dust-film. stack (against the clear transparent back) is another piece of
* remove both pilot lights,at this point the wiring
Additionally, problems related to the V-1's tendency towards
26.5mc to 32mc. The slide rule dial assembly is held together with two aluminum extrusions that have