Barry Kirkwood wrote:
>
>The G2DAF design was featured in the 4th edition (1968) of the RSGB
>Handbook, did not appear in 5th of 1976 which showed a 2x813 gg job.
>
>Suggests the editors thought gg better practice.
>
>Nevertheless G2DAF with 2x813 does seem highly reproducible, having been
>featured on the cover of RSGB Radio Communication magazine just a few years
>back, and is mentioned in that mag from time to time where users universally
>speak to its tractibility and good performance.
>
>I would assume that hundreds, if not thousands of 2x813 G2DAFs have been
>built.
>
Sorry, but none of that says anything about IMD.
RSGB handbook editors tend to favour whatever was more recently
published in the monthly magazine. It implies no technical judgement
whatever. (The 813 design was DC-grounded screen... better practice?)
Reproducibility and common use go together, but they still say nothing
about IMD.
73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'
'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.com/g3sek
--
FAQ on WWW: http://www.contesting.com/FAQ/amps
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
|