[ARC5] Why "Noodling" About Sweep Tubes

[Dennis Monticelli]

You may wish to consider connecting a beam power tube as a triode and
trying it in the application.  As noted previously the 6DQ6 is a
lightweight; indeed all sweep tubes are deficient in plate dissipation.
 They have a lot of cathode and can handle the peaks, but not the high
average.  The 6146B variants are better of course.

You should be able to find useful curves for triode-connected beam power
tubes among the audiophile documentation.

Dennis AE6C


On Tue, Oct 22, 2013 at 7:04 AM, Robert Eleazer <releazer at earthlink.net>wrote:

> Dave:
>
> I have a 12DQ6B, acquired for reasons that currently escape me.  Looks
> like it is NOS NIB.  Maybe I bought it in a lot of tubes, not sure.  I am
> pretty sure the 6DQ6B is a widely used sweep tube.  You are welcome to the
> 12DQ6B if you wish.
>
> I also have a couple of 6GE5's.  I believe these are sweep tubes and I
> know I acquired these for use in some future project; I think either a
> crystal controlled Galaxy transceiver or an HW-18.  I recall they were
> pretty cheap.
>
> Also, I recently bought a sleeve of five 6883B's.  They are 12 Volt
> 6146B's.  I plan to use them in a TS-520 I am repairing and also possibly
> in a HW-100.  They appear to be NOS NIB and cost me a total of $20 plus
> shipping, a total of less than $30.  Don't know if they are adaptable for
> the BC-375 but they are available on ebay, occasionally for astonishingly
> low prices.  The 6159, the 24 volt 6146, is available also; I got a pair
> for $10.
>
> Wayne
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