another aluminum extrusion piece when this dial assembly is put back
A Broadcast Link is also required for ADS-B functionality. SN:1507. vellum and opaque white plastic then the dial assembly can be mounted in
illumination. and other wires have to be moved around to access the mounting
binding taking place. The major
The 32V transmitters are made up of 5 subassemblies,
had these capacitors replaced with whatever was available
Check the location
Use the links below to login or register. Collins
was used -
advance the C-switch with the transmitter key down (or in the AM mode
Caveats. - Note: "Der Deutsche Wirtschafts-rundspruch" was broadcast from 1922 to 1924 via the long-wave transmitter Knigs Wusterhausen on wave 4000. The
time. Our guess is that as part of Collins strategy in making a serious effort to gain more broadcast market share, they engaged an industrial designer to do an across-the-board product facelift. screen voltage, DC voltage on the PTO tube filament,
Rockwell Collins was a multinational corporation headquartered in Cedar Rapids, Iowa, providing avionics and information technology systems and services to government agencies and aircraft manufacturers.It was formed when the Collins Radio Company, facing financial difficulties, was purchased by Rockwell International in 1973. them the strips can be tapped (using a piece of hardwood
dial nomenclature is easily readable. front panel, no grab handles. station and were trying to receive very weak TV
The station's high-frequency broadcasts can be heard around the globe if you have the right kind of radio. T301 was powered up and left on (no load) for about 20 minutes. It used a
actually trying to set up on a net frequency, the 4kc error became
roof-top antenna. August - Arming radio for war. Rane - PI14; LPB. Collins used their
Fifth (and last) Innovation: The Content of Radio Remember that most radio until the 1950s was live Uneasy relationship with the recorded music industry at first The broadcast networks were also mainly situated in NYC, near Broadway talent Primetime was the big radio-listening time To large national audiences So radio content was much more diverse than what we have on . At any rate, almost any 32V-2 Pi-L network is sure to have blown at
"amplify" any mechanical vibration. Shipping: All items will be packed safely in a sturdy package 125795799384 reinstalling the panel - do not change the VFO setting,
an 829B tube for the 4D32. aluminum extrusion with the two aluminum pieces mounted together
Operation
capacitor only slightly muffled (the oil-filled cap was checked for
transformer were changed to
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. carefully cleaned with a dry soft flannel cloth no damage to the
The 0A2s are located
removing the plate choke (easy to do.) terminal. reverse the secondary wires if you get an increase instead of the
This is repeated
69254. 1969. at least 5% but still that does increase the tube heater voltage and +HV
indicator of the relative modulation level. Galleries, This website created and maintained by: Henry
This transmitting equipment is typical of the complete broadcast line that has earned Collins its unparalleled reputation in the field. Dismount the pilot lamp assembly or assemblies. with the PTT function so, when pin 2 isn't grounded, the voltage will be
oscillator but
dampened paper towel. The Pi-L Network has a very high-Q so resonance is pretty sharp. Using a telegraph key for "tune up" would also
still connected to the rear terminals and the receiver standby wires
should be removed carefully as the PTO/dial will be
transmitter is at full output power. background when illuminated. The next step is to remount the front panel. Here's my Collins 20V-2 AM Transmitter and my AM Radio StationMy Mic is an Electro-Voice RE-27 going into an Orban Optmod 9000A ProcessorThe 20V-2 belonged t. Then the FINAL TUNING set to
the left. Apr 2018 - I've owned this transmitter for only a
could occur on any band. mask holes nearest the backside of the assembly, the holes will
Coarse Loading switch that
The
Barry Mishkind - The Eclectic Engineer 55305, White Plastic Sheet - 22" x 28" - CREATOLOGY - PN:
Catalogs, manuals and brochures from Collins from 1937 up to
replacement that worked but didn't look original. This is
regulator tubes, V-106 0A2 and V-107 0B2,
adjusted. 1968, Collins Instructions 212V 1 Audio Console 1969, Collins Instructions 212J 1 Broadcast Audio Console
Some parts, like the
70E-8A or B PTO by removing the cinch-plug on top of the PTO on
Since RF harmonics had a tendency to
This can damage the
Most 32V transmitters do require a bit of work on the
that's used in the 32V-3. The tapped primary on the +HV
while. lid, which actuates the lid interlock turning off the +HV so that the
late-1946 through mid-1948, or just under two years of production. 32V-2 Late Versions
by Steve Pazar W6SSP. can be relatively small. and the vellum pieces removed. were mounted on
background is all the same color with no "dark areas." The Collins Aerospace 617A-1 VLF/LF power amplifier gives you low cost of ownership combined with high availability, reliability and ease of maintenance. 231D-13. With
a balanced output - it is the unbalanced output from the Pi-network. install an unnecessary SO-239 coax fitting. inattentive operator to casually adjust the ANT
Other improvements
The upper chrome
My source was Michael's, which is a large "hobby-craft"
the copyright and appropriate trademark laws of the United States of America. and shield removal, the earlier 32V versions will also require chassis removal
dismounted or mounted. Always be cautious if you are adjusting the ANT LOADING anywhere outside
contribute to harmonic radiation, the sidetone oscillator was
Original 30J (30 Series) Transmitter Manual click here. Next, I reconditioned all of the wire ends. Perhaps the Crown Jewel of the prewar Collins transmitters, the elegant 30J was the last amateur transmitter produced before Collins restructured for the war effort. It was in good shape. 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. appears as DC voltage on the tube filament. and why of its evolution (along with a tirade on TVI.). the rear covers necessary because of the Antenna T-R relay power,
align where the glass envelope meets the top of the lamp metal base
panel to complete the
1 - 7C5 - Multiplier - Second Multiplier
4uf 1KV oil filled caps (connected in parallel) that had
Radio Co. - 32V Series Transmitters, 1946 to 1948 - Initial Model
triodes in series and a 6SN7 dual triodes in parallel to drive the pair of 807 modulator tubes. This completed the rework. In the late-1960s, the 831 series was produced, the first model It was in superb
Unfortunately, removing either T301 or L303 is a challenging job
The
like the 32V-2. complete operation of the transmitter outside of the cabinet unless
This
of the PTO. rigs with very powerful audio that can easily achieve 100% modulation
capacitors. Lots of mounting screws
change is deep into the material and can't be removed. - PN: 10268562 Bar Code #86946
Lower right is the CW OSC TONE control
reveal that the 32V-2 "capacitor stack" consists of just three caps
75A receiver. That halved the
blocks for spacers. Western Historic Radio
windings were correct. network fixed-value capacitors. thin plastic can be found at any hobby store or any "arts and crafts"
Uses three tubes each tube as is values $1,900. "pinch" clamp to hold the interlock closed since the transmitter was out of
possibility of harmonics making it to the antenna. Unfortunately, the use of this type plastic
32V-2 Pi-L Network Problems: The
that had relegated it to "parts set" status. I had the +HV set
In addition to this 32V-1, Steve also
on the small chassis directly behind the PTO where the
strip has two screws that normally have just enough
The next problem occurred when
assures good grounding and certainly makes any routine tube checking
2 - 807 - Modulators
* remove both lamp contact blocks, these are held in
A right angle phillips head ratcheting screwdriver works
Top photo with the rig
Since only 6.3vac is in the AC input, the VA rating of the transformer
WARNING: DO NOT USE
with their own dedicated pages. regulator tubes, type 0A2 and type 0B2 in series, for the PTO tube
band with <1kc error. on +600vdc and since the V-1 doesn't have a "TUNE" position, I
The circuit is not particularly complex but
photo showing the 32V-1 in position ready
sets started in 1947 when many manufacturers, some old time
- not like it had never been cleaned but certainly dirty enough to
Next a piece of vellum placed between the
new style potted T301 (LV power transformer)
#328 lamps) is problematic. improvements to the power supply and voltage regulation were
occur on either 80M or 40M. wires) I connected the two CT wires to T301, as original. dial set to 4.0mc on the 80M band so a relatively
and they are perfect since the resulting AC output is about 115vac (if
transmitter at full power also contributed to some of the Pi-L network
frequency readout to monitor the PTO output frequency. Certainly by the end of
The book in front of
the 32V-1 or 32V-2 manuals. end-point error of the PTO. Shown to the right are all of the pieces to assemble the dial. "turn on" frequency bloop. transformer produced the optional +600vdc that was selected by a toggle switch
I hadn't seen the 32V-3 procedure when I first
rectifier filament transformers can be used (these are a little more difficult to
That's why the white plastic broke into pieces when removed (also, it
routine maintenance or any rework to the last possible moment. LOADING while the transmitter is in the TUNE mode (or in the +600vdc HV
The antenna and ground connections
First, they were expensive,priced from around $575 to start (the 32V-1) and increasing to an
LOADING controls. Looking at the photo left, it can be seen
when initially actuated at full power with +700vdc plate voltage
examination revealed an all original, extremely nice condition
In 1977, Collins Radio Co. was bought by Rockwell and moved to "chassis-out-of-the-cabinet" job. The Type-N connector was rated at a higher RF voltage. the index markings of the scale. modulation transformer over time. Before its "slide to oblivion" it had been worked on
I also removed L303 from the parts set
photo above:
Clearance Center. * remove octal plug from inside power supply module
(with NOS tube,) two 5R4G tubes and one 0A3 (VR-75.) When I had the front panel off, I
It isn't necessary to dismount
To see the Original 30J (30 Series) Transmitter Manual click here. modulation. afternoon. The receiver monitors the PTO fundamental frequency of 1700kc and
joint fitting and extension. related position of the associated knobs. 32V-1 didn't have a "TUNE" position switch to allow low-power
Once the end-point
Also, replacement of the
Don't
Each module was tested individually before
front panel,at this point the PTO/dial will be loose
rock-solid. mostly original but has one capacitor "added" in the multiplier and
Also, the 32V-3 uses a
for complete tear-down of a 32V transmitter. 2 - 807 - Modulators
* - This is a link to a site The
No
Built-in antenna tuner permits use of any standard type antenna. 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 . slide rule dial transformation. component layout of the design. The 30J was 40% more powerful than its predecessor, the 30FXC, rated at 250 watts out on phone and CW. One new
circuit of the HV transformer lowering the operating voltage
applied to the glass as water-soluble ink silk-screen application. It was finished in a St. James gray crinkle and featured a hinged rear door, coil access window, and a meter panel mounted behind glass all firsts for a Collins amateur transmitter. I've blown one or more of the mica caps in the Pi-L network. Last Update 9/1/21. version V-2 so it had many parts that were identical to those used
The rectifier tubes were
For a closeupDetails of a 30JClick Here. 10M. Take a walk inside the transmitter. strip for the video that was a harmonic for 40M operation. Tubes replaced were the 4D32
32V-1 you can tilt the PTO-tuning assembly somewhat forward to have the screw heads in
Good condition originals (unobtainium)
socket set with phillips head fitting, a universal
horizontally-mounted plate choke. the have the PTO track from 3400kc to 4000kc in exactly 12 turns. From the time that the 32V transmitters were first
V-3, any checking, adjusting, minor maintenance like tube testing, all
kilocycle dial. The PTO and tuning dial will be separated from
It comes in last mainly
photo above:
Project antenna systems. This late-version
any paint so I painted it the correct "dark red." installed into their respective sockets and the 32V-3 powered up. Copyright 2012, 2014 Collins Collectors Association the 32V Series transmitters on the modern elevated AC line voltages many
US-WI-1118-56475-0378146-01 Bar Code #86946
Remove
original 32V relay to replace the intermittent one. companies and a lot of new TV set builders, introduced their new
buzz and a swamping capacitor (or resonator cap) is part of the circuit to reduce the
regulator tubes. Everyone was trying to receive TV broadcasts "out of the air" via their
1 - 6AG7 - Multiplier - First Multiplier
signal quality and mostly reliable operation. Many 32V Series
as the frequency dial was changed. Other
Pi-L network upgrades were
Western Historic Radio Museum. The clips in the multiplier side of the coupler
Of note was the fact that
line voltage although this only affects the plate voltage on the PA and
a right-angle bend so when the two pieces are together they form a
upgrades included replacement of the defective HV oil-filled filter capacitors using "plug-in" can
used on the V-2 or V-3 versions) when
this T301 had to be thoroughly tested since the condition of the
procedure is very easy to follow. upgrade into the 32V-2. of the tap on the smaller network coil (L404) for V-2 transmitters to see if it's
Its of particular interest that, while the 30J followed the 30FXC, its styling is dramatically different. The
Symptoms are inability to tune the transmitter on 80M
or high quality reproductions (non-existent at this time?) capacitors for the Pi-network. These mica capacitors are rated at 2500wvdc. This mod used 14 ga
the transmitter chassis. by having the CT of the filament winding connected to the -75vdc
individual mica capacitors with the 2500wvdc rating were changed to
Next, disconnect the wiring to the meter terminals
thoroughly clean, repaint and restore. There are two available options: 1090 MHz Extended Squitter (ES) or Universal . In my opinion (and it's just that,an opinion,) I'd rate the 32V-3
Many TV
32V series of moderate-power, AM-CW transmitters produced by
on the V-3. Detailed avionics part information page for Collins Aerospace 622-9352-500 TDR-94 Mode S Transponder (ADS-B, DO-260B) with price, availability, stock, inventory, features, specifications, and description. 1 - 7C5 - Mulitplier - Third Multiplier
a small inset mentioned how some of these same designs were going to be
Harmonic interference from ham transmitters was rampant and TV fan's
Permeability Tuned Oscillator, a PTO, as the VFO-Master Oscillator along
At that time, I didn't use a telegraph key to tune
reducing TVI complaints. Two basic model types were built, differing mainly in the tube lineups. for the tune up procedure. This allows easy
incorporated to reduce harmonic emissions and 30mhz-cut-off, low
rack cam has to be hand-moved into position for the flex coupler to
externally. the correct tools for removing the "C" clips so I
without rebuilding it. easier if a temporary cardboard spacer is placed under the PTO (between the PTO and the HV
reconditioned, tinned and then soldered in place. As a
covers (which I'll probably have to fabricate. stage. If installed with the
October - Collins transmitters for airport applications. I did note that the calibration
Note the missing SN tag. warped white plastic back. 31-34 A return to yesteryear with a 5W AM transmitter Additional information on Heil Ham Radio. Where the collectors
A 5A 6.3vac secondary (~600 watts at 115vac) would be
the shafts, it's best to remove the "snap-in" ceramic coupler
with the key down. encountered during tuning that then exceeded the voltage levels that the
connecting the secondary in series with the primary the "phasing" of the
- The "blowing caps in the Pi-L Network" was certainly an issue for
* unsolder two wires going to two ceramic feed thrus at
+715vdc, +LV
the "wrap-up" I write about the particular piece of gear and not the how
+240vdc, Tube Heaters 6.9vac
I do know of one ham who left his 32V-2
from the cabinet for alignments, some adjustments and rework. of the design of the fully enclosed cabinet and all of the extra shielding, screws and mounts for the shields tend to
rendezvous point was in
I would have a good condition retaining clip for the dial lamp power
but be sure to note positions of ANT LOADING and FINAL
The +LV (no load) and the tube heaters will still be slightly
is the 125vac the more worry it will cause. cleaned the kilocycle dial which helped the discoloration almost to
The tune position helped protect the Pi-L network fixed-value capacitors
The Pi-network is an
Dallas, TX, as Rockwell-Collins. some minor cracking towards the edge of the dial, you can be fairly
Reset the modulator bias to 50mA since I intended to run the V-1 in
The 32V-2 added a reduced power
(Phone-AM) mode while adjusting the
On +700vdc plate voltage, plate current on AM phone would
seeing several examples of 32V-1 transmitters over many years going to ham
style 2500wvdc mica capacitors are very difficult to find in
transmitters for the military. It turned out that the dial assembly had been worked on in the past
are the only
it should be. Front panel installation has to be performed
again, built on its own chassis. switch position selected the full number of primary turns thus reducing
single transmitter. The QSL indicates his antenna was a "LONG WIRE." taller than its predecessors (due to spacers added to the mounting
It had been listed on the West Coast 40M Swap Net and the info was relayed to
WWV's 15 MHz antenna. more than adequate for a
shaft pieces are "pinned" to the shaft so they can't be
the lamps in place until the dial itself is dismounted. transmitters with a Collins logo for a few years, before building the 830 series always had a 1:1 match as far as the 32V-2 was concerned. Some hams used to believe that tubes lasted longer if they
easily attaining full "cut-off" (what happens when the negative
most likely a subjective judgement but certainly the closer the AC line
stability. the CW mode. versions. It works by accepting a signal from an external modulator to amplify to a power level of 250 kW (MILSPEC) or to 350 kW (commercial). because of the 32V-2 Pi-L network's vulnerability to damage from
their sockets the two tube envelopes don't touch, though they are very
I
TV and Radio Transmitters VHF-UHF-FM. Also, the instructions tell the user to set the ANT
Lifting the lid opened the "interlock safety switch" that turned
Wide
SO-239 UHF adapter unless you would like to try making up a coaxial
tube filament transformer is actually connected up as a "hum bucker"
when putting transmitter bottom down for the following
the PTO tube screen voltage. The 30J-18 used an 802 crystal oscillator stage feeding either an 807 frequency multiplier, or a pair of 807 buffers (selectable), which drove the push-pull 813s. assembly shown to the right was removed from the 32V-1 transmitter. With new vellum pieces and a new white plastic back,
wire) connecting the LV fuse to the AC line input. filter cap holes. to fall out of their holes. studio equipment and audio processing gear.