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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment.

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Old 29th Aug 2022, 9:44 pm   #21
Scotch24A
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Default ar 88

Where is the choke L 50 located in the ar 88?
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Old 30th Aug 2022, 9:38 am   #22
ms660
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Default Re: ar 88

Quote:
Originally Posted by Scotch24A View Post
Where is the choke L 50 located in the ar 88?
L50 should be next to L49 (chassis topside) both should be next to the mains transformer as shown in manual page 18 in here:

http://www.vmarsmanuals.co.uk/archiv...8-D_Manual.pdf

Lawrence.
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Old 30th Aug 2022, 10:06 am   #23
turretslug
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Default Re: RCA AR88 Comms Receiver.

L50 is the inner one of the rwo on the left of the mains transformer looking from top front and quite close to the output valve.
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Old 30th Aug 2022, 9:40 pm   #24
Scotch24A
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Default Re: RCA AR88 Comms Receiver.

Thanks-found it.
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Old 31st Aug 2022, 8:40 pm   #25
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Default ar 88

I have been offered a Raytheon Jan Crp 5Y3GT replacement rectifier valve-is this OK-does anyone have any experience with this make.
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Old 31st Aug 2022, 9:24 pm   #26
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Default Re: ar 88

Hello,

Raytheon valves have got a good reputation all over the US. I have got some in several devices such as a RT-66/GRC. I have got no Raytheon 5Y3GT (= glass tiny) but a Raytheon 5R4WGB ( aka bullet proof rectifier).

Regards, Joe
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Old 31st Aug 2022, 9:31 pm   #27
turretslug
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Default Re: RCA AR88 Comms Receiver.

JAN stands for (United States) Joint Army/Navy stock, I don't know what sort of approval criteria they applied back then but they wouldn't have accepted any old rubbish.
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Old 31st Aug 2022, 10:01 pm   #28
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Default Re: RCA AR88 Comms Receiver.

Raytheon valves are generally excellent. The JAN verions are "more excellenter ".
If it is NIB ( new in box ) I wouldnt hesitate.

Joe
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Old 1st Sep 2022, 4:28 am   #29
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Default Re: RCA AR88 Comms Receiver.

Raytheon are still on the go, making things which go "whoosh....Bang" As seen on TV!

Their valves were made to good standards and have stood the test of time.

Company founded by Vannevar Bush. They have a plant near here in Glenrothes and are opening a new facility in the old Jabil building in Livingston.

https://en.wikipedia.org/wiki/Vannevar_Bush

David
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Old 11th Sep 2022, 8:47 pm   #30
Scotch24A
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Default Re: RCA AR88 Comms Receiver.

Thanks everybody.
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