Dear Ian:
I am just looking into the recent edition of PAT HAWKERS Technical Topics
Scrapbook page 109 which is a reprint of the September 1991 issue of RSGBs
RADIO COMMUNICATION in which G2DAF says the IMD of a single 813, as
indicated on on-air reports, to be some 45 down in relation to the wanted
voice sideband signal . Not very scientific and accurate but still an
indication the DAF can not be as bad as reported on this reflector. There is
more on the DAF on page 225 a reprint from the September 1993 issue.
45 dB refered to what . Pep? There must be some accurate spec analyzer
measurments made in the past. Ian, you are near the RSGB and are in the
position to find out?
Does anybody remember the Taylor modulation or the controlled carrier
operation of AM finals? A lot of similar dicussion as the one we have
to-day on this reflector but in practice very effective. Ah, them good ol'
AM days around 1958 when SSB was allowed to operate only at the upper
portion the 14 MHz band, above 14.3. I was there too with Swedens only and
first commercial SSB transceiver a COLLINS KWM-1?
73s de Hans SM5KI
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>Från: "Ian White, G3SEK" <G3SEK@ifwtech.demon.co.uk>
>Till: amps@contesting.com
>Ämne: Re: [AMPS] G2DAF and super cathode
>Datum: sön 19 dec 1999 17.53
>
>
>For anyone who's interested, I have scanned G2DAF's own description of
>his amplifier. The page images are downloadable from:
>http://www.ifwtech.demon.co.uk/g3sek/g2daf.htm
>
>(Owing to my ISP's policy of holding newly uploaded pages for review, it
>may not be accessible to the outside world until Monday.)
>
>73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'
> 'In Practice' columnist for RadCom (RSGB)
> http://www.ifwtech.demon.co.uk/g3sek
>
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