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Re: Sources for T4XC final tubes?

 

I have used GE, Sylvania and RCA tubes with no issues with the 2-tube transmitters. RCA may need additional capacitance to neutralise properly in a TR-4(any)

With so many years behind us since these sets came out, final tubes are getting scarce. I don¡¯t insist on ¡°matched¡± pairs anymore and have found that keeping the ones with the same frame structure together is more important for the purposes of neutralising properly.?

You can see the frame structure from above. Some tubes have rounded ends and others are more angled. Easier to see than to describe.?

Steve Wedge, W1ES

Time flies like an arrow. Fruit flies like a banana.


Sent from for iOS


On Fri, Jan 3, 2025 at 13:28, Dean N2TNN via groups.io <N2tnn@...> wrote:
Jay,

I¡¯m looking to do the same?thing. A matched pair is recommended. There is also a ¡°A¡± flavor tube. Which one is correct.?

Dean

Get
From: [email protected] <[email protected]> on behalf of Evan via groups.io <k9sqg@...>
Sent: Friday, January 3, 2025 12:21:24 PM
To: [email protected] <[email protected]>
Subject: Re: [DRAKE-RADIO] Sources for T4XC final tubes?
?
Sylvania 6JB6 are the preferred finals due in part because of easier neutralization.

On Friday, January 3, 2025 at 12:20:11 PM EST, Jay W6CJ via groups.io <lastradioman@...> wrote:



Group,
I'm looking for reliable vendors of tubes for the T4XC.

I understand the final tubes have to be from the same manufacturer, but do they have to be a matched pair?? ?(I don't have a tube checker).

Which tubes are best? Sylvania? GE?

Thanks & 73,
Jay
W6CJ

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