[ARC5] BC-453 mods

[Dennis Monticelli]

FYI.  A JFET is not a triode  It does have a "triode" like region prior to
pinchoff, but beyond that Vds bias point the current saturates like a
pentode.  The pinchoff voltage is low enough that it is rather impractical
ficult to run it as a triode in most cases.  But it's a good sub for a
pentode and you don't need any "screen" voltage.  The biggest limitation is
the max operating voltage.

Dennis AE6C

On Sat, Aug 6, 2011 at 9:50 AM, Kenneth G. Gordon
<kgordon2006 at frontier.com>wrote:

> Making the 1st IF regenerative in any of the models is easily done,
> and makes a big difference for weak signals....not so much for strong
> ones.
>
> Two pieces of #12 TH or THHN (with insulation still on) soldered to
> the grid and plate terminals, and a pot in the cathode is all it
> takes.
>
> The main problem I always had when trying to replace tubes with FETs
> is that an FET is basically a triode. For multi-grid tubes, this is
> often a real problem.
>
> For triodes, not so much.
>
> I have a pair of Tubesters here which I took out of a Heathkit VTVM.
> As I remember it, one replaced a 6AL5 and the other a 12AX7.
>
> vy 73,
>
> Ken W7EKB
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