6GE5 conversion of 6KD6 circuit?

[Wilson Lamb]

6146, a real tube, cheap.
WL
----- Original Message ----- 
From: "kd4e" <doc at KD4E.COM>
To: <BOATANCHORS at LISTS.TEMPE.GOV>
Sent: Thursday, February 18, 2010 4:42 PM
Subject: Re: 6GE5 conversion of 6KD6 circuit?


> Just looked more closely ...
>
> The 6JM6 matches the 6GE5 well for power and voltage
> and other specs, both are 17.5W plate dissipation.
>
> That explains the much lower price.
>
> The 6LF6 matches (actally exceeds) the 6KD6 for plate
> dissipation at 40W vs 33W and is otherwise very similar.
>
> Both are priced in the stratosphere.
>
>> That is an interesting alternative - but one has
>> to wonder why they are so cheap if they are an
>> easy substitute - any ideas?
>>
>> A single GI-7B would be neat - but I have doubts
>> the power supply could be boosted to a high
>> enough voltage to make that work.
>>
>> Some ideas here ...
>> http://www.xs4all.nl/~pa0fri/Lineairs/GLA1000/gla1000eng.htm
>>
>>>> Anyone done a 6GE5 conversion of 6KD6 circuit?
>>>>
>>>> Most sweep tubes are priced at insane levels.
>>>>
>>>> While the 6GE5 will not generate nearly the same output it is far less 
>>>> costly.
>>>>
>>>> http://www.nj7p.org/Tube4.php?tube=6GE5
>>>> http://tdsl.duncanamps.com/show.php?des=6kd6
>>>
>>>
>>> How about the 6JM6? As cheap if not cheaper than the 6GE5, same 17.5 W 
>>> rating,
>>> same pinout as 6KD6 except that with the 6KD6 all grids are connected to 
>>> two pins each
>>> whereas in the 6JM6 G1 and G2 are connected to only one pin each,
>>>
>>> <http://www.nj7p.org/Tube4.php?tube=6JM6>
>>>
>>> 73,
>>>
>>> Deane McIntyre VE6BPO
>>>
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>>
>
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>
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