[R-390] R-390A front end tubes

[Perry Sandeen]

 Hi List and Larry,
Thanks for the extensive article on tubes for the R 390A front end.
>From what I can discern, the RF section is set up for sharp cutoff pentodes.
I wonder if the "A" would be any better by using a 6AK5 in the front end as Collins did on the R-388?
FWIW, Ray Osterwald (sp) ER radio editor created what he called "a competition grade" "A" using IIRC a 6HA5 triode in the front end but did have to change the bias.
I have a copy of the article.  If any wants one please email me off list and I send you a copy. IIRC its also in the Y2KR3 manual.
Regards,
Perrier