Any chance of seeing a cct of this, Walter?
Info re xfmrs used would be particularly interesting-just to see how
they compare to 'local' designs.
73
Dave, ZL3FJ (who has several tube/valve LF txs!)
----- Original Message -----
From: "Walter Blanchard" <[email protected]>
To: <[email protected]>
Sent: Monday, March 20, 2006 6:10 AM
Subject: LF: Low power Tx
I found a Decca Aerial Testing Signal Generator Type 1615 at a junk
sale a few months ago. It's basically a xtal osc/driver/PA transmitter
for LF (Decca freqs 70-127 kHz). Very easily converted for 136 because
the o/p transformer is wide-band enough to cover 136 and needs no
modifications. Plug about 100 mW 136 kHz RF into a xtal socket and it
will give out 20-25w RF into 72 ohms (PA is 2x807's). My old Marconi
2019 SG was quite adequate as signal source. Quite a lot were made so
there may be a few more appearing round the junk sales and if you see
one it's well worth �5 of anyone's money!
Walter G3JKV.
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