[Amps] What tube?

[Carl]

Old 813's, 4-400A, and most any other post WW2 glass tube may benefit
 from the same regettring process as the 3-500, 572B, etc.

Ive recovered many 211/VT4's, 809, 810, 8000, 8005, 813, 4-250/400's, and 
others the
 same way as Ive salvaged 3-500's back to a long and useful life.

Do Russian tubes have out gassing or vacuum problems? They are two entirely
different issues.

Carl
KM1H



--------------------------------------------------
From: "Roger (K8RI)" <k8ri at rogerhalstead.com>
Sent: Thursday, January 29, 2015 11:37 PM
To: <amps at contesting.com>
Subject: Re: [Amps] What tube?

> On 1/29/2015 5:19 PM, Gerald Williamson via Amps wrote:
>
> Not necessarily.  Particularly older glass bottles like the 813 and glass 
> to metal like the PL172 which go gassy with little or no use.  Good 813s 
> are gettiong harder to find and I think PL172s are rare while the 8295A 
> version brings a premium price.
>
> 73
>
> Ro0ger (K8RI)
>
>
>> Bill, he had the right idea; except they last longer if you never turn 
>> them
>>   on!
>>   73,
>> Gerald K5GW
>>   In a message dated 1/29/2015 2:08:25 P.M. Pacific Standard Time,
>> wlfuqu00 at uky.edu writes:
>>
>> We had a guy in our club that believed that tubes would last longer if 
>> you
>> never turned them off.
>> Naturally, the tubes were completely flat after he  had not used the
>> amplifier over a period of time.
>> Practically no emission,  but they did glow.
>> bill  =
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>>
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