[AMRadio] Valiant progress

George KB2Z Thermionic_Emission at earthlink.net
Sun Aug 28 20:35:56 EDT 2005

Glen Zook K9STH has a good paper on the variants posted on his web site
I think this is a good URL.   http://home.comcast.net/~k9sth
Good luck, George KB2Z

At 12:15 PM 8/28/05, you wrote:

>Thanks to Jim, Larry et. al. for the great advice on my Valiant 
>restoration project.
>   I'm very interested in the common wisdom re: the 6146 variants 
> that 'work' in this rig.
>   Now, I've been a boatanchor fan since they were state of the art 
> - have done quite a bit of tube design, mostly audio though, and I 
> do have quite extensive documentation on most tubes made in the last 100 years.
>   So really there's probably no excuse for this question other than 
> laziness - what exactly are the 6146 characteristics that the 
> Valiant design "favors" over the other variants? A freind who has 
> re-built a lot of these rigs says to only use 'plain' ones.  In my 
> ignorance, I bought a nice full set of 'W's and the transmitter 
> wouldn't even resonate on any band. ;{}  I put three 'B' s in the 
> finals, and we're where we are now - OK on 20M and above, 'runs 
> away' below that.
>    What do y'all recommend for Valiant finals / modulator tubes?
>   On the HV B+ filter issue - mine are iffy, were replaced sometime 
> in it's history, but I'm going to renew them - what is the 
> recomendation for a more 'modern' replacement - keeping in mind 
> that I'm looking for the best AM fidelity I can squeeze out of this rig.
>   Cheers
>John  KB6SCO
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