[Hallicrafters] Re: Solid State 5Y3

[Sandy W5TVW]

If you MUST do a solid state sub. for the 5Y3, don't forget to put a 47-150 ohm 1 watt resistor in
series with each anode lead.  This will help save the power transformer if the diodes should ever
short.  Also easier on the filter caps as well during warmup!
73 Sandy W5TVW


----- Original Message ----- 
From: "Mark Shaum" <k9tr at dtnspeed.net>
To: <hallicrafters at mailman.qth.net>
Sent: Saturday, February 11, 2006 3:22 PM
Subject: [Hallicrafters] Re: Solid State 5Y3


| >  Or you can also just use an empty tube socket ( break and old tube ) go
| > to radio shack buy some 1000 piv at one amp diodes and make a diode string
| > , just a few on each leg and to do the same thing. Now the problem of the
| > filiment voltage is taken care of , there isn't any..
| > 73 tim
| > wb8uhz
|
| One more step is useful after the above.  Un-solder the two 5v filament
| leads from the rectifier socket and tape them off.  This reduces the chance
| for a HV to filament winding short, which is generally fatal to the
| transformer.  Many 32V series exciter owners have learned this the hard way
| with the low voltage B+ supply.
|
| 73! Mark K9TR
|
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