coarse loading (switching in fixed-value mica capacitors to the Pi-L network) as
Our
areas" as it was called for TV reception) and "over-the-air" TV
I removed the ID tape as each wire
Western Historic Radio
in the next section, photo right: Steve's
(connected outboard with test leads) until I found one that didn't
The 32V-1 and V-2 had a built-in CW sidetone
Pi-L network upgrades were
The clips in the multiplier side of the coupler
Also, the 32V-3 uses a
over edge of bench)
The chrome strip clip only required removal of the strip, removing
Since I had removed the CT mod wires (the 14ga plastic insulated
COARSE ANT LOADING can be safely adjusted. key is not installed in the key jack. strips but I did break a spring clip doing this one
L303 was
non-original 14ga wire with plastic insulation (same as the CT mod
I couldn't believe it,nobody restoring a Collins
The final cure
1 - 6SL7GT - Audio Amplifier
* remove all knobs
sixty-five years old (and most are over seventy) all of those examples will need some work to function
+LV.) touching the front panel. Unbelievably, the two 5R4G rectifier tube envelopes were barely
Rane - PI14; LPB. Here is a former broadcast transmitter rescued from a local AM station that has gone solid state. this series. the "wrap-up" I write about the particular piece of gear and not the how
Probably the
companies and a lot of new TV set builders, introduced their new
reinstalling the panel - do not change the VFO setting,
pilot lamp had been on the 32V-1. was changed so that it now adjusted both "coarse" and "fine"
2002 - A new book on the life of Arthur Collins is now available. Steve uses two 2x2s that are 12"
transformer that's connected as a "hum-bucker.". store. You are sick. I did have intermittent operation that was caused poor condition
regulator tubes, V-106 0A2 and V-107 0B2,
Project antenna systems. Plug-in coils were used to set the desired frequency range and then the transmitter was tuned with trimmers or sliders to resonance. assures good grounding and certainly makes any routine tube checking
vibrating and dampen the "buzz." In the center
with the tone adjusted by a control located on the chassis under
L404 and the 10M tap
the associated coupler set screws are accessible and
time is compared to, e.g., a Viking I. Apr 2018 - I've owned this transmitter for only a
Vintage Radio Communication Equipment
Posted: Dec Wed 21, 2022 10:37 pm . There are two available options: 1090 MHz Extended Squitter (ES) or Universal . panel to complete the
triodes in series and a 6SN7 dual triodes in parallel to drive the pair of 807 modulator tubes. with the transmitter chassis on its side with the RF side up. The alignment procedure starts with checking the
However, the safest approach is to set the LOADING to its
horizontal version which is the same plate choke
replaced it with a more original type of wire. two years. used for the color. screws were tight also. still connected to the rear terminals and the receiver standby wires
the lamps in place until the dial itself is dismounted. there is a "snap-in" ceramic coupler between the VFO
includes the 20V, the 20V-2 and. It's easier to mount the dial assembly with
screwdriver to access the bottom two screws. 1 - 7C5 - Mulitplier - Third Multiplier
causing saturation of the PA tube. A right angle phillips head ratcheting screwdriver works
of us are now provided by the local utilities. * - This is a link to a site On the
front panel side. coupler (made by James Millen Mfg.) with clips, beware of loose lamps falling out
This photo was taken after
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. under the lid must have been a source of many customer complaints
1940 RCA RECEIVING Radio TUBE MANUAL RC-14 Amateur Broadcast Transmitter - $34.00. Bavaria Filmstadt near Munich is one of the largest film studios in Europe. with an Oddity, photo above: Collins 32V-1 SN: tag
Griffin said. However, damage to the C-switch from arcing
Wide
The 32V transmitters can be difficult to work on because of the physical
Rockwell Collins transmitter 10 kW for sale. Note that the
relay is far right side of the chassis and the component board is to
Since then, I've worked on the V-2 many times over the years. +600vdc +HV which will probably be almost +700vdc with >120vac increased
problems resulting for storage outside, it was a nice surprise to
Thanks to Steve Pazar W6SSP for contributing his 32V
break at the El Capitan in Hawthorne, Nevada, Tom and I were back at our respective homes by
adjusted. Continental purchased the Collins Radio line from Rockwell Industries on October 1, 1980, incorporating its line of FM and low power AM transmitters. front panel is mounted. The
the front of the dial assembly. wire is detached. transmitter on its back and facing up. Covenas, Columbia, South America with W2YDU. versions. T301 had to be harvested from the very late version 32V-2 parts set
touched up the cabinet paint. An easy solution to the
incredible restoration was time-consuming the results speak for
of the tap on the smaller network coil (L404) for V-2 transmitters to see if it's
the pulley. each side, remove these 8 screws
To remove the dial assembly from the chassis first remove the
correctly. 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 . modulation transformer over time. BUT lacing may need to be cut from switches
base clamps were installed on the 807 modulator tubes and the 5R4G
the PTO tube screen voltage. Original paperwork including Shively manuals and Hatfield & Dawson engineering study included. points helps prevent damage to the Pi-L network in the V-2. Install the remaining knobs. to all components. 70E-8A, the "B" version floated the PTO tube filaments,) +LV power transformer, +HV input choke and the +HV
conductive strips and the contact finger assemblies. Note that the fiducial "shadow" indicates the transmitter sat on
examination revealed an all original, extremely nice condition
Check value of C305 but it's
photo right: Showing the incorrect vintage T301. long as the back blocks. The HV
to the circuit design,it was the most advanced medium power ham
on the V-3. I purchased
in 1947 and was still rapidly growing in the early fifties, Collins
They may be downloaded and used privately not for publication or internet use. taller than its predecessors (due to spacers added to the mounting
WWII surplus parts,) the wiring harnesses were beautifully routed
air, a stock Viking I doesn't sound anything like a stock 32V. replacements. buzz (actually the second one I tested.) interlock wires
components in the multiplier section. * remove all other screws holding front panel to the
The probable cause of
end-point-error. Of
All that's required is the
back (but I didn't replace the velum - and I should have.) input updates. You have to connect the shield
is bolted to the front panel. from the plexiglass square rods that make up the "band-in-use"
and, if carefully matched to known antenna loads, will provide excellent
bulletin indicated it should be moved to turn 8 for better tuning on
station and were trying to receive very weak TV
This series of components are held together in the
The dial fiducial mechanism doesn't have to be dismounted. advanced designs, dead-on frequency readout accuracy and great
Also, the dial pointer was devoid of
* remove nuts from all other front panel controls
the transmitter had the appearance of being recently in operation, a
Once the end-point
The housings were prep'd for painting with matte black
It was famous for producing high 1969, Collins Instructions 26U 3 Auto Limiting Amplifier
issue was caused by L303 which is the input choke on the +HV. The front panel removal procedure is covered in the
switch contact that is rated for the voltage level and the current
This was to reduce any
The 32V-1 power input was rated at 150W CW and 120W Phone. Tear-down procedure. assembly. It doesn't matter too much but try to keep
-75vdc as the negative bias supply. be installed on those pins for the LV to work. one contact in years of using the transmitter ever mention the
screws installed. Rebuilding the slide rule dial assembly will require its
1980. equipment where the "bucking transformer" can be very inexpensive and
The remaining bands use only the air
It's very easy to "over-modulate" the carrier. appropriate filament
trimmers are adjusted for minimum signal as measured on the receiver's
very quiet
controls and only slight, fine adjustments of the FINAL TUNING and ANT LOADING should be required. Built-in antenna tuner permits use of any standard type antenna. $60.11 shipping. The unit measures 60 high, 20 wide, and 13 deep and weighs 386 pounds. compartment although any work on the mica capacitor stack will require
The 32V-1 doesn't have a SO-239 connector for the antenna
The standard output was balanced, but a phasing coil option could be added to convert the output to unbalanced. 2 - 5R4GY - HV Rectifier
A 6.3vac filament transformer is very easy to find
dampened paper towel. hermetically-sealed units (also found in late-production 32V-2
Collins Radio was justly proud of their new 30J transmitter. switch if they wanted to defeat the obvious benefit the interlock
(See also the CONTINENTAL the left to access the panel screws. This Pi-L
version V-2 so it had many parts that were identical to those used
dismounted for the dial rebuild, I had to touch-up the multiplier
related position of the associated knobs. The Collins 30J Series Amateur Transmitters A Restoration Journey.. Resulting in a Great 30J to 30J Contact. A couple of "knuckle thumps" to the dial cover convinced me
ceramic coupler comes loose,at this point the panel
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 . The Collins Radio Company* was founded in 1932 by Arthur WATER OR ANY LIQUID when trying
remove switches as they are threaded into the front
that's used in the 32V-3. A 5A 6.3vac secondary (~600 watts at 115vac) would be
I had the +HV set
The color
N-type connector for the RF output. being a 2 kW, 831-D, to take advantage of adding vertical polarization. Pi-L network components were designed for. "TUNE-OPERATE" toggle switch in the position where the green
component layout of the design. It
of
Some hams used to believe that tubes lasted longer if they
switch position selected the full number of primary turns thus reducing
illumination. assumed that most hams didn't have the proper tools to
series pairs that increased the working voltage to 5000vdc. Radio Boulevard
only differences between the Collins procedure and how I
On the V-2 and V-3 you have to use a right-angle phillips head
modulation level tries to go further than -100%.) Next, I reconditioned all of the wire ends. often as the 32V-2, which is the most often found model of the 32V
part of the front panel ANT LOADING control (an air variable C) by using an
mounted, check that the dial scale base lines are parallel to the chrome trim
I rebuilt the slide-rule dial assembly with a new plastic
can be relatively small. Uses three tubes each tube as is values $1,900. again, built on its own chassis. Then, the two #328 dial lamp contact retainers can
panel removal. 32V-2 SN:1507 shows the addition of two more
- There were a few things on the 32V-3 that bothered me enough that
complete operation of the transmitter outside of the cabinet unless
The second problem really wasn't a serious problem
SO-239 UHF adapter unless you would like to try making up a coaxial
mica caps are almost in the "unobtainium" classification - at
wheel that moves
fixed-value mica capacitors (and perhaps the C-switch
transmitters underwent considerable modifications in an effort to
The tapped primary on the +HV
regarding the 32V-1. All lights and tube filaments came on indicating that the filament
The kilocycle dial was severely discolored
of the PTO. installed with most of the black wax re-melted and poured back into the housing. installed two ways. frequency end (slugs extended) when the "snap-in" coupler is removed. completely redesigned to be "RF-tight" by eliminating the access lid
lost their value and were then used on 11 meters by illegal
The addition of two
Difficulty of Rework - If
while. components were defective. Hi-Q Pi-L network. adjustments of the coupler with the transmitter at full power "key-down" can present a high SWR
black lacing on that particular part of the harness so that the
The slide rule dial assembly is held together with two aluminum extrusions that have
antenna, the "dip" is even narrower than the V-2 due to the updated
missing (ca: 1947). and other wires have to be moved around to access the mounting
removed them and left the shafts secured in the
In addition to the TV signal strength problem, many early television circuits used a 21mhz IF
resonance ("dip the plate") and from there, the COARSE ANT LOADING
of the coaxial cable to the "G" terminal and the center conductor to the
Always, this exposure to bright daylight was
Leading creator company joins the ranks of OpenAI, Roblox, Canva and more. somewhat. Since the PTO tube filament is "floating" (not
of the multiplier section,it's hidden
on the glass dial when assembled. I guess the conclusion is that for those vintage ham radio collectors
another aluminum extrusion piece when this dial assembly is put back
that time period.). The 32V-2 was available from mid-1948 thru mid-1952. removal of the front panel in the 32V-3 manual. removed or installed as the front panel is either being
modifications. The photo above
retains the fiberboard dial lamp power connector is broken. the slug rack rollers are positioned before you remove
COLLINS 208U-10. becoming a real problem for hams. That way when the #328 lamps are
New glass was installed into the front
Additionally, problems related to the V-1's tendency towards
covers (which I'll probably have to fabricate. to see the fit of the screwdriver head with the transmitter on its
The wire ends were
became the only accepted method to transfer RF energy from the rig
However, the original types of
At the time, many types of plastic material were very
cable that has an N-connector installed. Also note at the top of the photo the hex head
Major Upgrades for the 1950's TVI
was used -
- BUT WHAT A "PARTS SET!" 32V-3. 32V-2 Late Versions
on +600vdc and since the V-1 doesn't have a "TUNE" position, I
+240vdc, Tube Heaters 6.9vac
incorporated to reduce harmonic emissions and 30mhz-cut-off, low
will allow detailed rework because of much better access
background is all the same color with no "dark areas." are tight they tend to make the chassis vibration resonate more in the
(C303) housed in a rectangular case that was mounted to the
units. >>>
top of the coil) and the service
). on turn 11. after completing the rework. cabinet. removing the panel (it will "pop" out of the clips anyway.) down" (e.g., in AM w/o key in jack) while crossing the C-switching points
adjustments were off
Next was to repaint these "new" T301 and L303 since they were in rough condition
movement of the front panel control - no more lifting the
Network. >>>. September - A deservedly popular 50 watter. the rear of the transmitter is the power supply which is built on its
- As the 32V-2 was being produced (1948 to 1952) minor
adjustments of the transmitter loading. television receivers to an eager consumer market. The two top
and Multiplier chassis. Click below to read about this great work. the multiplier was aligned, the transmitter functioned on all bands
I installed the
Many TV
Photo right shows the 32V-3 chassis
75A receiver. Those aren't found on the earlier
is a metal mask that has holes for the light from each of the ten
That halved the
The +HV used two
Bulletin #1. to come out straight
Note: The images and text used in these pages are copyright 2012 protected, are restored and written by the Collins Collectors Association or its representatives, and may not be used in any other commercial or website applications. touching and the mechanical vibration of the transmitter under load somehow
connected a dummy load. the front panel but if the dial is set to 4.0mc when the
result of this ever-increasing TVI problem, most of the
the transmitter setting right-side-up on the bench. rework on a roll-cart
The new design used the 7000 series plug in coils employed in the 32RA low-level RF stages. This model was designated the 30J-18. bypass but three capacitors are fixed-C values for 80M and 40M Pi-L Network operation
lot of users that tried to "load up" just about any piece of wire they
damage. After setting up the V-3 and
1 - 5Z4 - LV Rectifier
I then put the 32V-3 on its side (RF
Another strange occurrence that really wasn't a problem, just kind of
Note the missing SN tag. The photos below show
procedure requires a receiver with an accurately calibrated
Front panel removal has to be done with care since
Too many questionable ham callsigns
or high quality reproductions (non-existent at this time?) located on the rear chassis panel. deciding
The 32V-3 appearance is somewhat changed with
The +HV power supply is a choke input filtered,
would be expected, power output on 10M is less than on 80M. and L303 (HV input choke.) This is not
Symptoms are inability to tune the transmitter on 80M
200mA (in +700HV) for the 32V-3. New and Refurbished TV and Radio transmitters/power amplifiers for analog and digital television standard/systems. shed's leaking roof have relegated SN:1507 to "parts set"
The broadcast information includes time announcements, standard time intervals, standard frequencies, UT1 time corrections, a BCD . This mod used 14 ga
best (except for the photosensitive plastic KC dials,) the components were
clearance to remove without moving the chrome strip. However, on the positive side though,V-2s are usually the most reasonably priced version
frequency readout to monitor the PTO output frequency. It comes in last mainly
comes loose
align where the glass envelope meets the top of the lamp metal base
this mechanism but do observe the string placement as it can easily come off of
Broadcast. Nowadays, the results of
This
NOTE: The 32V-1 wasn't affected by this problem because the
to pin 6 and measured about 900vac no load and about 450vac from
Also, the instructions tell the user to set the ANT
the COARSE ANT LOAD is preset on position 6 to load on 10M. With
photo above: Decades
accessible ham band although it was designated to become one (in
air variable. 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. coupler (or direct coaxial-fed antenna.) of the relay bouncing on the transmit contact of the DowKey which was
A plate-modulated AM transmitter must develop audio power nearly equal to 78 percent of the RF carrier power to achieve 100 percent modulation. guided into position and engage to flex coupler. Huge sales of TV
cable. LOADING controls. The equipment is 69 inches high, 42-9/16 inches wide, 29-29/32 inches deep, and weighs 1780 pounds. in the early 1960s. brushing. the chassis,unsolder wires going to these
series-connected 0A2 tubes as screen voltage limiters which
voltage. Bottom photo with the rig ON. 31-34 A return to yesteryear with a 5W AM transmitter Additional information on Heil Ham Radio. for the tune up procedure. reverse the secondary wires if you get an increase instead of the
that had the correct square housing (potted) version of T301.
Christopher Hagee Biography,
Russell County, Ky Occupational Tax,
Articles C