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| To: | [email protected] |
|---|---|
| Subject: | Re: LF: SAQ |
| From: | Alex Deligiannis <[email protected]> |
| Date: | Mon, 02 Jul 2007 11:26:44 +0300 |
| Delivered-to: | [email protected] |
| In-reply-to: | <[email protected]> |
| References: | <001901c7bbbc$c235cce0$f2407ad5@w4o8m9> <[email protected]> <[email protected]> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
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M. J. Powell wrote: In message <[email protected]>, Alex Deligiannis <[email protected]> writesSAQ was -63 DB key down - 81 to -83 DB key up ( leakage) static noise from -90 to -82 DB on SPM-12 with 31m wire + 6SN7 CFA 6SN7 ! Hooray! Mike G3IJE Yes an old double triode in cathode follower configuration( the two triodes in parallel Ia+ 18 mA) to convert the high impedance of the wire antenna to 75 ohms and to isolate the receiving equipment. A horn arestor at the input of the amplifier regularly sparks during thunderstorms but I continue to be QRV something I can't do with modern fets (J310, CP666).... 73's Alex |
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