Re: Mystery Wire in Valiant Wiring Harness
Alright Mike!!!
Yep...as soon as you brought this up and I looked at the assy manual wiring and compared that to my 61' mfgd factory wired Valiant.....
I knew that you had found an assembly problem.
My Valiant has the original manual as the original owner wrote the purchase date of Oct 3, 1961 and still has the warrantee card and the original wood transformer braces used in shipping.
The story is that this unit was bought by a lady who never got her Amateur license than left it in the crate.
Decades later....it found it's way to a Club.....then it found it's way to me and I recapped it for a friend and got it on the air.
Eleven years later...after still not being used by the owner....we made a deal and I drove to pick it up....and here it is.
It is virtually NIB.
And I use it a lot.
Anyway....I am guessing that there is a later assy manual which corrects this wiring problem...surely EFJ must have heard about it....I'll bet later mfg kits had the assy correct info.
There is a correction sheet for the manual....I didn't look at it but there might be something there..
Good job Cuz....
Dave Harmon
K6XYZ
Sperry, OK.
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-----Original Message----- From: Michael D. Harmon <mharmon@...> Sent: Monday, April 7, 2025 5:56 PM To: Dave Harmon <k6xyzdave@...>; Ashley Hall <Ashley40@...> Subject: Re: [EFJohnson-Amateur-Radio] Mystery Wire in Valiant Wiring Harness OK folks, I have it all figured out! Lugs 4, 5, and 6 on TS25 are the secondary of the mod transformer. The reason that lug 5 has two wires is because the secondary is actually two windings, and connecting the red/yel and grn wires at lug 5 forms the center-tap for the secondary. OK, so much for the secondary! The primary winding has the plate leads for the modulator tubes connected to lugs 1 and 2. That leaves the center tap for the transformer primary. The Assembly Manual says to connect the red wire to TS25 lug 4. THAT IS WRONG!!! The red wire is the center tap for the transformer primary, and MUST NOT be connected to one of the secondary windings! OK, so we connect the red wire to lug 3 of TS25. The center tap of the mod transformer must be connected to B++. That's the purpose for the "mystery" blu wire. That wire is the B++ feed from J8 to the mod transformet. That connection is made at lug 2 of TS18. There is a second blu wire attached to lug 2, and that is the wire going to the B++ bus. Now we have the "mystery" of wire 71 solved! The Assembly Manual simply omitted all references to wire 71. If someone built the transmitter according to the Assembly Manual, it was never going to modulate! Thanks to Dave and Ashley for their collaboration, especially the nice color pics from Dave! 73, Mike, WB0LDJ
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Re: Mystery Wire in Valiant Wiring Harness
Hi Dave,
The 4th lug from the front panel?on TS25 is actually lug 3 (numbering starts from the end nearest the 5V4 (XV20).? I built my harness from the schematic in the Operating Manual since my Valiant came with a lot of wires in the harness missing and disconnected.? The harness schematic shows a blue (71A/71B) wire going from breakout "K" (near the mod tubes) to breakout "Q" (near the rear panel), although there's no step in the Assembly Manual that references this wire.
I'm putting the transmitter back together working from the Assembly Manual, so I don't know what was there before.? Sections N-46 thru N-53 describes the connections from the mod transformer to lugs on TS25.? There are steps to connect and solder all the mod transformer wires to TS25 EXCEPT lug 3.? It makes sense that B+ from the power supply would go to the mod trans primary CT, but there aren't any extra wires coming from the mod trans besides the ones I've accounted for.
Could you write back and tell me the colors of the mod trans wires connected to each lug on TS25 (lug 1 is next to the 5V4 HV rectifier XV20)?? I suspect there's an error in the assembly manual as to which mod trans wires go to which lugs on TS25.
Thanks for your help!
Mike
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Re: Mystery Wire in Valiant Wiring Harness
惭颈办别…. I looked at the assy manual….see fig X and fig A. There is no wire on the lug in question….but there IS a blue wire as I mentioned below. That is likely why you can’t find reference to that blue wire in the assy manual. My unit is a lot later than that assy manual…might be a correction in the errata sheets. Likely a undocumented wiring update….perhaps the BAMA manual is an earlier version….dunno. ? Rodger….got any comments?? ? Dave Harmon K6XYZ Sperry, OK. ?
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From: [email protected] <[email protected]> On Behalf Of David Harmon via groups.io
Sent: Monday, April 7, 2025 7:48 AM
To: [email protected]
Subject: Re: [EFJohnson-Amateur-Radio] Mystery Wire in Valiant Wiring Harness
Importance: High? Hey 惭颈办别….. I just happened to have a nice factory assembled 60’ model Valiant 1 on the bench for some routine maintenance. I looked at your breakout points and with P8 removed there IS a blue wire that buzzed from L26 (J8 pin 6) to TS25 4th lug from front panel (T3 CT modulator tube side.) There are 2 blue wires on L26…..see schematic. ? I didn’t look at the assy manual although I have one….I just looked at the rig at your breakout points. ? Dave Harmon K6XYZ Sperry, OK. ? ? I'm in the process of re-kitting a Valiant I transmitter using the Valiant Assembly Manual. The Valiant wiring harness schematic in the Valiant Operating Manual shows blue wire 71 entering the harness at breakout K and coming out at breakout Q. ?Breakout K is between the modulator tube sockets (XV16 & XV17), and breakout Q is at the RF output SO-239. I have looked over all the steps in the assembly manual multiple times, and I can't find any references to 71A or 71B. Could you check your resources and tell me if you see any references to this wire? Considering that it is the last numbered wire in the harness, I wonder if it was put there for some purpose, and then never used, or maybe it was originally used for some purpose which was then deleted. I'm really puzzled! ?Like I said, I've been through every assembly step in the book, and there are NO references to wire 71!
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Re: Mystery Wire in Valiant Wiring Harness
Hey 惭颈办别….. I just happened to have a nice factory assembled 60’ model Valiant 1 on the bench for some routine maintenance. I looked at your breakout points and with P8 removed there IS a blue wire that buzzed from L26 (J8 pin 6) to TS25 4th lug from front panel (T3 CT modulator tube side.) There are 2 blue wires on L26…..see schematic. ? I didn’t look at the assy manual although I have one….I just looked at the rig at your breakout points. ? Dave Harmon K6XYZ Sperry, OK. ?
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From: [email protected] <[email protected]> On Behalf Of Mike Harmon via groups.io
Sent: Sunday, April 6, 2025 11:11 PM
To: [email protected]
Subject: [EFJohnson-Amateur-Radio] Mystery Wire in Valiant Wiring Harness? I'm in the process of re-kitting a Valiant I transmitter using the Valiant Assembly Manual. The Valiant wiring harness schematic in the Valiant Operating Manual shows blue wire 71 entering the harness at breakout K and coming out at breakout Q. ?Breakout K is between the modulator tube sockets (XV16 & XV17), and breakout Q is at the RF output SO-239. I have looked over all the steps in the assembly manual multiple times, and I can't find any references to 71A or 71B. Could you check your resources and tell me if you see any references to this wire? Considering that it is the last numbered wire in the harness, I wonder if it was put there for some purpose, and then never used, or maybe it was originally used for some purpose which was then deleted. I'm really puzzled! ?Like I said, I've been through every assembly step in the book, and there are NO references to wire 71!
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Mystery Wire in Valiant Wiring Harness
Hi Folks,
?
I could use your help!
?
I'm in the process of re-kitting a Valiant I transmitter using the Valiant Assembly Manual.
?
The Valiant wiring harness schematic in the Valiant Operating Manual shows blue wire 71 entering the harness at breakout K and coming out at breakout Q. ?Breakout K is between the modulator tube sockets (XV16 & XV17), and breakout Q is at the RF output SO-239.
?
I have looked over all the steps in the assembly manual multiple times, and I can't find any references to 71A or 71B.
?
Could you check your resources and tell me if you see any references to this wire?
?
Considering that it is the last numbered wire in the harness, I wonder if it was put there for some purpose, and then never used, or maybe it was originally used for some purpose which was then deleted.
?
I'm really puzzled! ?Like I said, I've been through every assembly step in the book, and there are NO references to wire 71!
?
Thanks for your help!
Mike, WB0LDJ
mharmon at att dot net
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Re: 6N2 with a Viking 2 supply/modulator
I’m about to begin modifying my Viking 2 for operation with the 6N2. The modifications on the Viking 2 seem straight forward with the exception of two things.
?
Thing 1: changing out the VFO socket on the Viking 2 to a 9 pin socket and “socket support shell”. I’m not following what a “socket support shell” is unless it’s the mounting bracket for the socket that connects it to the chassis. I’m unable to find a 9 pin socket so I planned to simply use the existing ceramic 8 pin socket. Pin 9 on the 6N2 is a ground and there appears to be several unused pins on both the V2 and the 6N2. I’ll just use pin 8 for a ground and replace the existing 6N2 9 pin male connector to a 8 pin male. I’ve got plenty of 8 pin male and female connectors and shields.
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Thing 2: I don’t see anywhere in the 6N2 manual providing these instructions to modify the Viking 1 and 2 or the Ranger that the modifications will allow normal operations of this equipment after they are modified to work with the 6N2. If it’s necessary to reverse these modifications to operate my gear on HF, I may look for another way to supply and modulate my 6N2.
?
I’ll put a sticker on the Viking 2 VFO socket stating that plugging a 122 VFO into this socket might not be a real good idea.
?
Thanks,
Tom N5AMA
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Re: 6N2 with a Clegg Thor modulator/supply
I have resolved myself to modification of my Viking 2. The instructions in the 6N2 manual seem straight forward except the part where the V2 vfo connector is changed with a 9 pin Noval socket (and the pin “extensions” are cut off). I’m not sure what they are trying to do here. It seems all 9 pins are used on the conversion but the 9 pin “noval” sockets seem to be unavailable. I might be able to get away with installing a regular 8 pin octal socket and running a 9th wire outside the socket through a hole in the chassis. This will make both the mating plug and the socket availability easier. I’ll use the 6N2 vfo with the 6N2 rf unit but I guess this modification prevents using the 122 vfo with the Viking 2.
?
I’m not happy about losing the V2 vfo capability, but if the modification and the “6m band” operation doesn’t work for me, I can always reverse the modification and return the V2 to original.
?
Tom N5AMA
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It's nice to hear about your Johnson gear. And I really like the picture. When I was a teenager growing up in NE Iowa we made a few trips to the FCC office in St. Paul for exams and also to Canada for fishing. We often stopped in Waseca on those trips to visit Herters - an awesome fishing and outdoors gear supplier. Herters was just across the street from EF Johnson and I remember looking over and dreaming about what might be going on in that building. I did tour their plant in 1974 but it was mostly CB radio production at that point.?
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ef johnson scorpion vhf 5953a
Is there any info on programming software and cable?
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On 4/1/2025 6:22 PM, Steve Bookout,
NR4M via groups.io wrote:
You won’t
normally see a bunch of traffic here.
Well since we've got no
pressing technical issues,? here's something that might be of
interest to new and old members alike.
The EF Johnson Company
was growing rapidly in the late 1950s and had run out of both
administrative and factory space.?? This photo was taken at
the ribbon cutting for the 113,000 sq. ft. new building on
July 2 1961,? which was designed in 1959 to handle double the
sales volume at that time.?? However by the time of the
ribbon-cutting,? Edgar was quoted as saying "Sales have
increased so rapidly we are approaching that point now."?
Further expansions were made in subsequent years.
Pictured are Minnesota
Governor Elmer Anderson and the Johnson brothers - Edgar,?
Marvin, and Everette:
73, Bob W9RAN
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Hello Jerry, You won’t normally see a bunch of traffic here. ?If someone has an issue, people seem to appear ‘out of the mist’.? Back about COVID time, it seemed like I somehow wound up with a bunch of Johnson stuff. ?It gave me plenty to work on.? I believe I have the following stuff.? 6- Viking II’s. Two are Civil Defense models? At least 6 VFO’s Two Valiants Two Rangers Two Thunderbolt amps Two vacuum tube T/R switches So, I’ve got a bunch. Never wanted a desk KW, nor the 500.? Johnson made some solid transmitters back in the day.?
Welcome to the group.?
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On Apr 1, 2025, at 4:51?PM, W0PWE via groups.io <j.b.hall@...> wrote:
? I just found this group and subscribed so I thought I would say hello. EF Johnson gear has always appealed to me and I have fond memories of the Viking II I used as a Novice in 1970. I didn't own another EFJ transmitter until very recently when a friend and former colleague gave me a Viking Challenger that had been stored in his basement for the last 50 years.?
?
Bringing the Challenger back to life has presented some challenges (pun intended I guess). After new PS capacitors, power cord and internal fuse it acted like it wanted to go but after a few minutes of operation the 15 ohm meter shunt went up in smoke. I think I have found the root cause for that and have it under control but I need to do more work on it.?
?
My Challenger came with some mods. Someone replaced the 6DQ6A finals with 6146s. It has a 6AU6 and some mods in the oscillator circuit. It has (had) the PTT mod. I removed the PTT mod in the process of trouble shooting the run away plate current problem. Not sure if I will restore the PTT mod or not as I mainly want this transmitter to be a Novice rig.?
?
Anyway, I'm glad I found this group and I look forward to reading and taking part in the discussions.
73 - Jerry - W0PWE
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Welcome, Jerry !
You’ll find helpful, friendly folks here.
Among the rigs in my radio-overpopulated-shack are a Valiant and a Navigator along with a couple of Messengers converted to 10 meters.
Thanks for joining us!
Mike/
K5MGR
____________________________________ ? Mike Langner
929 Alameda Road NW
Albuquerque, NM 87114-1901
(505) 898-3212 home/home office
(505) 238-8810 cell
mlangner@...
?
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From: [email protected] <[email protected]> On Behalf Of W0PWE via groups.io
Sent: Tuesday, April 1, 2025 2:50 PM
To: [email protected]
Subject: [EFJohnson-Amateur-Radio] New Member? I just found this group and subscribed so I thought I would say hello. EF Johnson gear has always appealed to me and I have fond memories of the Viking II I used as a Novice in 1970. I didn't own another EFJ transmitter until very recently when a friend and former colleague gave me a Viking Challenger that had been stored in his basement for the last 50 years.? Bringing the Challenger back to life has presented some challenges (pun intended I guess). After new PS capacitors, power cord and internal fuse it acted like it wanted to go but after a few minutes of operation the 15 ohm meter shunt went up in smoke. I think I have found the root cause for that and have it under control but I need to do more work on it.? My Challenger came with some mods. Someone replaced the 6DQ6A finals with 6146s. It has a 6AU6 and some mods in the oscillator circuit. It has (had) the PTT mod. I removed the PTT mod in the process of trouble shooting the run away plate current problem. Not sure if I will restore the PTT mod or not as I mainly want this transmitter to be a Novice rig.? Anyway, I'm glad I found this group and I look forward to reading and taking part in the discussions.
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I just found this group and subscribed so I thought I would say hello. EF Johnson gear has always appealed to me and I have fond memories of the Viking II I used as a Novice in 1970. I didn't own another EFJ transmitter until very recently when a friend and former colleague gave me a Viking Challenger that had been stored in his basement for the last 50 years.?
?
Bringing the Challenger back to life has presented some challenges (pun intended I guess). After new PS capacitors, power cord and internal fuse it acted like it wanted to go but after a few minutes of operation the 15 ohm meter shunt went up in smoke. I think I have found the root cause for that and have it under control but I need to do more work on it.?
?
My Challenger came with some mods. Someone replaced the 6DQ6A finals with 6146s. It has a 6AU6 and some mods in the oscillator circuit. It has (had) the PTT mod. I removed the PTT mod in the process of trouble shooting the run away plate current problem. Not sure if I will restore the PTT mod or not as I mainly want this transmitter to be a Novice rig.?
?
Anyway, I'm glad I found this group and I look forward to reading and taking part in the discussions.
73 - Jerry - W0PWE
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Re: 6N2 with a Clegg Thor modulator/supply
Good morning Bob,
That is exactly what I was after. I planned to use an external speech amp I already have and supply filament externally if necessary. The Thor unit has an output connection to monitor plate current. I was concerned about impedance mismatch. I’m still looking for alternatives. Finding a Thor rf deck would be the best solution but still have the option of modifying one of my Viking units. All this will become unnecessary once I get the Zeus in house and working, so I don’t want to get too carried away.
?
Thanks for taking the time to help! Have a great weekend.
Tom N5AMA
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Re: 6N2 with a Clegg Thor modulator/supply
On 3/27/2025 9:12 AM, Tom Smith via
groups.io wrote:
Does anyone
have any experience mating a 6N2 with the Clegg Thor
supply/modulator?
Hi Tom,
I haven't done that combination but I have
used the Clegg Thor modulation-power supply with a couple of
transmitters that don't have one,? including the little Palco
Bantam 65 and an ARC-5 transmitter.? As long as you stay within
the limits of the available filament and plate currents I'd
think it should be OK.???? Obviously some Franken-radio
engineering will be required!
Since the Thor RF deck includes the speech
amplifier and high-level audio is sent over the cable to the
modulator,? you'll have to come up with some kind of mic
preamp.? I don't recall the details but I remember using a
little LM-386 board for the job,? and by careful selection of
pins on the connector it didn't disturb the normal operation
with the Thor RF deck.?? I removed some unnecessary panel
component to add a mike jack without drilling extra holes.
73, Bob W9RAN
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6N2 with a Clegg Thor modulator/supply
Does anyone have any experience mating a 6N2 with the Clegg Thor supply/modulator? I’m trying to put a 6N2 on 6m AM for some local rag chewing and really not interested in modifying either of my Viking 1 or 2 transmitters to work with the 6N2. I think I should be able to cobble up a cable between the two if it makes sense.
?
I would go with the Thor transmitter and supply but can’t locate a Thor transmitter. Any help appreciated.
Tom N5AMA?
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Looking for a Johnson Invader
Still looking for an Invader (NOT Invader 2000).? If you have one to sell and are going to Dayton, here's your chance to sell it without having to ship.? Or, I might be willing to come and get it.??
?
73, Floyd - K8AC
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Jeff,
If you use a lathe, be careful.? The aluminum of the cap is 'dead
soft' for forming and about any type of tooling you use will grab
the can with really bad result.
'If' you could mount a Dremel tool with a disk cutter on the tool
post and MANUALLY rotate the chuck, you should wind up with a
decent looking cut.??
If the cut is good and smooth, you could probably take both
edges, cap body and base, and further smooth them by lapping them
with fine grit sandpaper on a very flat surface, like thick glass
plate.? Joint will only be minimally visible.
73 de Steve, NR4M
On 3/19/2025 12:28 PM, jeffbauman via
groups.io wrote:
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Thanks, Don.
?
I used wide metallic aluminum tape for the cover.? It would
have worked perfectly had I done a better job of cutting the
can.
?
I used a tubing cutter and I anticipated the ratty result -
no surprise here.
?
Next time I will chuck the cap in my lathe using something
like this ...
?
WEN
LA4444 4-Inch 4-Jaw Self-Centering Chuck Set with 1-Inch x
8TPI Thread
?
..
and just lay a hacksaw against the rotating can for what I
believe will be a smooth cut.
?
73,
Jeff
W8KZW
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Thanks, Don.
?
I used wide metallic aluminum tape for the cover.? It would have worked perfectly had I done a better job of cutting the can.
?
I used a tubing cutter and I anticipated the ratty result - no surprise here.
?
Next time I will chuck the cap in my lathe using something like this ...
?
WEN LA4444 4-Inch 4-Jaw Self-Centering Chuck Set with 1-Inch x 8TPI Thread
?
.. and just lay a hacksaw against the rotating can for what I believe will be a smooth cut.
?
73,
Jeff
W8KZW
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Mike Langner
Floyd - K8AC