Re: Exotic Tubes offered.
Skip, I am interested in purchase of all your tubes.? Might you please advise what you have available.? Ship on my UPS account. Many thanks, Robert W4RRD 904 264 2946? a Land Line 1400 2400 Eastern ?
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From: [email protected] < [email protected]> On Behalf Of Waldo Magnuson via groups.io Sent: Friday, May 3, 2024 12:29 PM To: [email protected]Subject: [HallicraftersRadios] Exotic Tubes offered. ? I came by these tubes from a friend and now SK.
Some are exotic looking and most will be hard to find references to.
Price is $1.00 each for my dusting them off and packing plus shipping cost which I estimate from $5 to $15 each.
The first list is:
RCA JAN CBC810
RCA VT136
GE JAN-872A
Eimac 4-65A
RCA JAN CRC-3529
GE JAN CG-2C40
Eimac 7034/4X150A
The next list, in a day or two, will have more easily referenced tubes.
Skip Magnuson W7WGM
Spokane, WA
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Re: Sprague capacitors variants
I have been examining the US EPA documents about PCB oil used in condensers. Sprague is stated to have used a PCB oil with trade name Clorinol, Cornell Dubiler used Dykanol, Aerovox used Hyvol, and Sangamo used Diaclor. This is from Table 4-3 on page 4-11 (Image 67 of 346) of .
The only type of condenser produced by Spraque which contained Clorinol that I could find were AC condensers used as motor run/start capacitors. Curiously at least two of this type of capacitor are still available for sale on EBay (for example Sprague OVD-4300 30 MF 440 VAC).
One of the comments from which I found particularly interesting was: “Worked at Sprague electric in Vermont as a designer in R and D. The Black Beauty went through many iterations, i.e. dielectrics, insulators, encapsulation material. While they look the same their properties are quite different, and their construction; i.e., winding of the foils, the mandrill size, and tension foils overlays dielectric thicknesses, all made up the voltage and capacitance and frequency ratings the encapsulation material effects. Most were made to customer orders and specifications while there’s some (which were) generic their specifications were very broad.” So Sprague Black Beauty capacitors were a trade name for a variety of tubular film capacitor types of varying electrical and material properties that evolved over their life time.
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Hi, Skip
FYI - that Tung-Sol '4832' tube is likely a 4B32,
a Xenon gas equivalent to the 872A mercury vapor rectifier.
The 3BP1 CRT was used in the Central Electronics
model MM-2 transmitter monitor.
73,
Ed Knobloch
k4pf@...
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Re: Sprague capacitors variants
Thanks Jacques Nice that there are lots of catalogs, but as it work on my machine, CTRL-F? does not work for me, so I gave up for now. Have you seen “black beauty” on any metalized caps?, I am just going by the magazine ads. ? Another related thing, is vitamin Q. In reading many ads, I keep on wondering what ?vitamin Q is. They certainly don’t make it clear, but the Hi temp keeps on raising the question that maybe it has PCBs. Then I ran into this very long legal/financial document? which hints & raises more questions ? ?????? ? Attached is my marked-up copy of the top part , but I don’t know if I can send it thru. ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Jacques_VE2JFE
Sent: Thursday, May 2, 2024 11:20 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] Sprague capacitors variants
Importance: High? Don, ? Maybe it can help your searches or maybe not: there is a site where you can see all Allied Electronics Catalogues from 1929 up to 2015. Sprague and many other capacitors manufacturers listed within. Just go to : ? 73, Jacques, VE2JFE in Montreal ? Yet thanks Jim, it worked ! ,then… I went down the Sprague group looking for the 109p ?[ads from about 1955 to 1959] and I could not see “109p”. ?those 109p’s had HCX? and there seemed to be nothing matching. What is also confusing is that some metalized ?caps were called Black Beauty , but I have never found a metalized called ?“Black Beauty” ?in ads. don??? va3drl -- don??? va3drl
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Re: Exotic Tubes offered.
Hi, Skip I could use the RCA CBC810, if still available. (Actually, I could use a pair if you have them). Is Paypal alright, or I could send a check if you prefer. For your info, the VT-136 on your list is the 1625 tube (like a 7-pin, 12 Volt 807), used in Command sets. The 872A is a big mercury rectifier used in the Johnson desk KW and Collins KW-1. The RCA '3529' may actually be a 3E29, a once-popular VHF final, same as an 829B. Thanks Ed Knobloch k4pf@... I came by these tubes from a friend and now SK. Some are exotic looking and most will be hard to find references to. Price is $1.00 each for my dusting them off and packing plus shipping cost which I estimate from $5 to $15 each. The first list is: RCA JAN CBC810 RCA VT136 GE JAN-872A Eimac 4-65A RCA JAN CRC-3529 GE JAN CG-2C40 Eimac 7034/4X150A The next list, in a day or two, will have more easily referenced tubes. Skip Magnuson W7WGM Spokane, WA _._,_._,_
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P-2000 Power Supply for SR-2000 FOR SALE
Newbie here. Thanks for welcoming me and I hope this post is appropriate.
?
Not tested, requires evaluation to determine condition and desired restoration. This is from the estate of a long-departed SK and idle for over 30 years. I have kept it sleeping and have not applied power for any evaluation. I understand it will likely require recapping.
?
Visual Inspection
It is complete and in good cosmetic condition. All components above and below chassis appear original with no visible deformities or arcing. Two cables have been added that extend out and terminate in RCA plug/socket connectors. This appears to break out the speaker with the ability to loop back providing choice of internal or external speaker. It has a 230V line cord/plug with a 115V adapter and is wired for 115V. Photos attached.
?
I will not ship this 60-pound boat anchor. I will be attending Dayton this year and could deliver it there, along my route or it’s available for pickup in Minneapolis, Minnesota. Asking $700 or best offer, COD.
?
~Pat -W?YES
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Second list of tubes.
I came by these tubes from a friend and now SK.
Some are exotic looking and most will be hard to find references to.
Price is $1.00 each for my dusting them off and packing plus shipping cost which I estimate from $5 to $15 each.
Ting-Sol JAN CAHG-4832
RCA 866-A (2ea.)
GE GL-4-125A/4D21 (3 ea.)
12AU7A (how did that get in?)
RCA 4-65A (5 ea.)
Eimac 4-65A
JAN 3BP1 (~3” dia. Oscilloscope tube)
and a
Electro Voice Mic. 605 HiZ
More to come.
Skip Magnuson W7WGM
Spokane, WA
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I came by these tubes from a friend and now SK.
Some are exotic looking and most will be hard to find references to.
Price is $1.00 each for my dusting them off and packing plus shipping cost which I estimate from $5 to $15 each.
The first list is:
RCA JAN CBC810
RCA VT136
GE JAN-872A
Eimac 4-65A
RCA JAN CRC-3529
GE JAN CG-2C40
Eimac 7034/4X150A
The next list, in a day or two, will have more easily referenced tubes.
Skip Magnuson W7WGM
Spokane, WA
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Re: SR2000 /SR400 RX/TX offset fix
Dave, if you move the carrier point you are just changing the pass band.? Not the frequency.? This would be like adjusting a PBT on icom or shift on yaesu. Only it works on TX also.??
On this radio and others, there is a shift of tx frequency.? If you tune in a station, when you tx you will be off freq when you reply.??
I thought about a pot.? You could put it up top on a bracket for easy adjustment. But I decided on fixed value.??
I have a few hours of talk time on this radio now and get good reports back. Thr rx and tx is within a cycle. Thats gokd enough for me. This should be a standard fix for all the radios in this series.?
You will need to calibrate the vfo center after this change.? Set cal pot to middle. Set dial to 0.? Then adjust the slug on bottom of vfo for center.?
C
Very Cool,
In the Yaesu FT-857 the radio had a feature that allowed the operator to adjust the Carrier Point for either lower or upper sideband in receive or transmit?+/- 300Hz (p.97 of the operations manual).??
This tweak reminds me of that Carrier Point feature. Makes me think one could substitute a 10k pot for the fixed resistor and have one more adjustment to tinker with....;-)
73
dave
wa3gin
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Yes!? ?I now have 2 hours of talk time on it. With the dd 103 counter, there is nonoffset and everyone is happy.
C
Great idea!
73/jeff/ac0c
alpha-charlie-zero-charlie
On 5/2/2024 6:40 PM, W7WRX wrote:
These radios drop approximately 40 cycles on TX.? This is annoying in modern times.
This drop happens in ALL modes.? I isolated the VFO from the radio and found the issue is the VFO itself. It's not a voltage regulation problem.? The 12ba6 is an odd ball vfo tube and why they used a sharp cutoff tube like this I do not know.?
Rather than rebuild and modify the radio, my friend, Jim k7jeb and I decided to offset the TX voltage to the varactor.? This is done with a 1meg resistor and a 10K.??
Place the 1meg from terminal 12 on relay to the ground terminal next to it.?
Next, unhook the wire from pin 8 on relay.? Insert a 10K resistor in series with relays terminal and the wire.?
That's it.? The offset is gone..it will be within a cycle.?
The rit and cal pot all work normally.??
Hope this helps someone.?
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Re: Hallicrafters in an old ABC News clip
On Fri, May 3, 2024 at 09:54 AM, Dale WB3BEF wrote:
Would be interested if you have a link to where you saw this, or what season/episode numbers was it?
?
The old ABC News clip appears at 12:38 in this Youtube video: https://youtu.be/zRdhoYqCAQg?si=4oJy76zQ7a5B9fOt
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Re: SR2000 /SR400 RX/TX offset fix
Very Cool,
In the Yaesu FT-857 the radio had a feature that allowed the operator to adjust the Carrier Point for either lower or upper sideband in receive or transmit?+/- 300Hz (p.97 of the operations manual).?? This tweak reminds me of that Carrier Point feature. Makes me think one could substitute a 10k pot for the fixed resistor and have one more adjustment to tinker with....;-)
73 dave wa3gin
Yes!? ?I now have 2 hours of talk time on it. With the dd 103 counter, there is nonoffset and everyone is happy.
C
Great idea!
73/jeff/ac0c
alpha-charlie-zero-charlie
On 5/2/2024 6:40 PM, W7WRX wrote:
These radios drop approximately 40 cycles on TX.? This is annoying in modern times.
This drop happens in ALL modes.? I isolated the VFO from the radio and found the issue is the VFO itself. It's not a voltage regulation problem.? The 12ba6 is an odd ball vfo tube and why they used a sharp cutoff tube like this I do not know.?
Rather than rebuild and modify the radio, my friend, Jim k7jeb and I decided to offset the TX voltage to the varactor.? This is done with a 1meg resistor and a 10K.??
Place the 1meg from terminal 12 on relay to the ground terminal next to it.?
Next, unhook the wire from pin 8 on relay.? Insert a 10K resistor in series with relays terminal and the wire.?
That's it.? The offset is gone..it will be within a cycle.?
The rit and cal pot all work normally.??
Hope this helps someone.?
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Re: Hallicrafters in an old ABC News clip
Probably a S-27 Bruce..
Paul? N6FEG?
I noticed a Hallicrafters rig in an old ABC News clip that appeared in a recent Last Week Tonight episode covering the history of UFOs, back to the WW2 era. I am curious if anyone has a guess on the model in this very low resolution snapshot..
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Re: Hallicrafters in an old ABC News clip
That’ll most likely be an S-27 (or maybe an S-36, later version of the 27).? Would be interested if you have a link to where you saw this, or what season/episode numbers was it? ? Dale WB3BEF ?
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From: [email protected] <[email protected]> On Behalf Of Bruce KX4AZ
Sent: Friday, May 3, 2024 9:44 AM
To: [email protected]
Subject: [HallicraftersRadios] Hallicrafters in an old ABC News clip? I noticed a Hallicrafters rig in an old ABC News clip that appeared in a recent Last Week Tonight episode covering the history of UFOs, back to the WW2 era. I am curious if anyone has a guess on the model in this very low resolution snapshot..
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Hallicrafters in an old ABC News clip
I noticed a Hallicrafters rig in an old ABC News clip that appeared in a recent Last Week Tonight episode covering the history of UFOs, back to the WW2 era. I am curious if anyone has a guess on the model in this very low resolution snapshot..
|
Re: SR2000 /SR400 RX/TX offset fix
Yes!? ?I now have 2 hours of talk time on it. With the dd 103 counter, there is nonoffset and everyone is happy.
C
Great idea!
73/jeff/ac0c
alpha-charlie-zero-charlie
On 5/2/2024 6:40 PM, W7WRX wrote:
toggle quoted message
Show quoted text
These radios drop approximately 40 cycles on TX.? This is annoying in modern times.
This drop happens in ALL modes.? I isolated the VFO from the radio and found the issue is the VFO itself. It's not a voltage regulation problem.? The 12ba6 is an odd ball vfo tube and why they used a sharp cutoff tube like this I do not know.?
Rather than rebuild and modify the radio, my friend, Jim k7jeb and I decided to offset the TX voltage to the varactor.? This is done with a 1meg resistor and a 10K.??
Place the 1meg from terminal 12 on relay to the ground terminal next to it.?
Next, unhook the wire from pin 8 on relay.? Insert a 10K resistor in series with relays terminal and the wire.?
That's it.? The offset is gone..it will be within a cycle.?
The rit and cal pot all work normally.??
Hope this helps someone.?
|
Re: SR2000 /SR400 RX/TX offset fix
Great idea!
73/jeff/ac0c
alpha-charlie-zero-charlie
On 5/2/2024 6:40 PM, W7WRX wrote:
toggle quoted message
Show quoted text
These radios drop approximately 40 cycles on TX.? This is annoying
in modern times.
This drop happens in ALL modes.? I isolated the VFO from the radio
and found the issue is the VFO itself. It's not a voltage
regulation problem.? The 12ba6 is an odd ball vfo tube and why
they used a sharp cutoff tube like this I do not know.?
Rather than rebuild and modify the radio, my friend, Jim k7jeb and
I decided to offset the TX voltage to the varactor.? This is done
with a 1meg resistor and a 10K.??
Place the 1meg from terminal 12 on relay to the ground terminal
next to it.?
Next, unhook the wire from pin 8 on relay.? Insert a 10K resistor
in series with relays terminal and the wire.?
That's it.? The offset is gone..it will be within a cycle.?
The rit and cal pot all work normally.??
Hope this helps someone.?
|
Re: Sprague capacitors variants
Don, ? Maybe it can help your searches or maybe not: there is a site where you can see all Allied Electronics Catalogues from 1929 up to 2015. Sprague and many other capacitors manufacturers listed within. Just go to : ? 73, Jacques, VE2JFE in Montreal ? Yet thanks Jim, it worked ! ,then… I went down the Sprague group looking for the 109p ?[ads from about 1955 to 1959] and I could not see “109p”. ?those 109p’s had HCX? and there seemed to be nothing matching. What is also confusing is that some metalized ?caps were called Black Beauty , but I have never found a metalized called ?“Black Beauty” ?in ads. don??? va3drl
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Re: 5T restoration - IF cans and R4 toasting
Calling this one complete.? I just need to add terminal posts/strip on the rear for the three antenna leads, not sure how they where originally terminated.? Only pictures I've seen show the three wires coming thru the grommet on rear of chassis and hanging there.? If anyone has a pic or details on on the antenna leads where dressed I could use the input.
Thank you.
--
Dan
K1DTS
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Re: Sprague capacitors variants
Yet thanks Jim, it worked ! ,then… I went down the Sprague group looking for the 109p ?[ads from about 1955 to 1959] and I could not see “109p”. ?those 109p’s had HCX? and there seemed to be nothing matching. What is also confusing is that some metalized ?caps were called Black Beauty , but I have never found a metalized called ?“Black Beauty” ?in ads. ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Jim Whartenby via groups.io
Sent: Thursday, May 2, 2024 4:13 PM
To: [email protected]
Subject: Re: [HallicraftersRadios] Sprague capacitors variants? Did you try the URL I sent a few hours ago? Logic: Method used to arrive at the wrong conclusion, with confidence.? Murphy On Thursday, May 2, 2024 at 02:06:56 PM CDT, don Root <drootofallevil@...> wrote: Ditto here ? ? Can't get this to load. Tried both Firefox and Edge
_,_._,_ -- don??? va3drl
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SR2000 /SR400 RX/TX offset fix
These radios drop approximately 40 cycles on TX.? This is annoying in modern times.
This drop happens in ALL modes.? I isolated the VFO from the radio and found the issue is the VFO itself. It's not a voltage regulation problem.? The 12ba6 is an odd ball vfo tube and why they used a sharp cutoff tube like this I do not know.?
Rather than rebuild and modify the radio, my friend, Jim k7jeb and I decided to offset the TX voltage to the varactor.? This is done with a 1meg resistor and a 10K.??
Place the 1meg from terminal 12 on relay to the ground terminal next to it.?
Next, unhook the wire from pin 8 on relay.? Insert a 10K resistor in series with relays terminal and the wire.?
That's it.? The offset is gone..it will be within a cycle.?
The rit and cal pot all work normally.??
Hope this helps someone.?
|
don Root
Dave Jordan
Jacques_VE2JFE