solid state rectifier tube replacements

[Larry Knapp]

Tom - Good afternoon.  Getting 'everyone's thoughts' is probably going to be very different.

I have a DX-100B.  It still has all the tube rectifiers in it, no solid state replacements...just
don't feel the need to do so.  I did replace all the hi/lo/bias caps in the power supply.  I also
have some spare tubes so finding them is not a very high priority.  It's certainly your choise.  I
believe though, if I've heard the overall ham community correctly, when using ss replacements
there may be a need to put in additional voltage dropping resistors.  Your mileage may vary....I
just don't see the need to put in 'Solid State Equivalents'.  I would however, put the correct
rectifier tube in the proper place...that is, 5R4's instead of 5U4.

Good luck.  73, Larry KC8JX  

--- "TChesek at Epix.Net" <tchesek at EPIX.NET> wrote:

> I'm presently working on a DX-100 that I recently acquired and the 5V4 has an internal short
> therefore I'm going to replace it. Also, this radio has two 5U4 rectifiers installed instead of
> the 5R4 which gives me concern since the filament current requirement for the 5U4 is 3 amps vs.
> 2 amps for the 5R4. I'm considering the Solid State Equivalents sold by Radio Daze which have
> in-rush current limiting as opposed to going to a straight solid state replacement. Their cost
> per tube is $22 which is pretty steep and I know that I can stick with vacuum tubes for half
> that or less if I shop carefully.  Also, what about "solid-stating" the 6AL5 as mentioned in
> some of the "recommended" mods...Do I really gain anything?
> 
> Everyone's thought are welcome on this. Thanks in advance!
> 
> 73,
> Tom K3TVC


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