[Boatanchors] [Heathkit] Help w/ tubes

[Paul Kraemer]

Excellent point about the metal tubes, they usually go cheap on the ebay, 
because you can't see the color of the plate or shape of the getters.
Also I believe the 6BG6 has been suggested as a better than replacement with 
a minor socket rewire and plate cap addition---or make an adapter. At least 
it has the same heater current requirement. 6.3v 0.9a
Paul K0UYA
----- Original Message ----- 
From: "Rich Post" <postr at ohiou.edu>
To: <heathkit at mailman.qth.net>; <boatanchors at mailman.qth.net>
Sent: Friday, November 27, 2009 7:46 PM
Subject: Re: [Boatanchors] [Heathkit] Help w/ tubes


> Hi Dave,
>
> Have pondered this question myself for the three Heath high voltage reg
> supplies at my QTH.  The tubes in that relatively simple application are
> not all that critical if they can handle the current (50 mA each).
>
> I am planning to try the 6DQ6.  It should easily handle the current and 
> can
> certainly handle the voltage.  The main issue is the need for a plate cap
> in place of pin #3.  An adapter and an insulated top cap would be ideal if
> plug-compatibility is to be maintained.  Otherwise the only pin of concern
> is bringing the plate pin (3) out to the top cap.  All the other pins 
> match
> the 6L6GC.
>
>  The only drawback I can seen is the somewhat greater filament
> current.  The other subs that come to mind are the much-in-demand
> audiophile tubes with equally high prices.  The top-cap horizontal output
> tubes are mostly ignored by the audio crowd for good reasons but would 
> seem
> to be OK inside a protective metal boxed device like the Heath reg power
> supplies.
>
> If you can find metal 6L6 tubes, my Heath PS-4 uses those.  Audio buffs
> avoid those because they don't glow.
>
> 73 de Rich KB8TAD
>
>
> At 06:44 PM 11/27/2009, Paul Baldock wrote:
>>I think an EL34 will work
>>
>>- Paul
>>
>>
>>
>>At 12:38 PM 11/27/2009, Dave wrote:
>> >I have two Heathkit SP-2717A HV power supplies and both need the
>> >6L6GC tubes.  Anyone now where I can find atlease a pair for a
>> >reasonable price?
>> >
>> >Or, prefereably, anyone know of a substitute I use in place of the 
>> >6L6's?
>> >
>> >Thanks,
>> >
>> >Dave
>> >
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