[AMRadio] Johnson Valiant Crystal Control Question


w0ng at comcast.net w0ng at comcast.net
Sun Sep 9 18:13:20 EDT 2007


Thanks Geoff,

That helps a bunch! Appreciate the quick reply.

73
Bill
w0ng
-------------- Original message -------------- 
From: Geoff/W5OMR <ars.w5omr at gmail.com> 

> w0ng at comcast.net wrote: 
> > After all these years I should know this but the answer presently escapes me. 
> In order to operate a Valiant I transmitter on AM using crystals instead of the 
> VFO, what actual frequencies would the rocks for 75, 40, 20, 15 & 10 meters 
> actually be cut for? 
> > 
> > Are they all fundamental frequencies or are some cut for the 2nd and 3rd 
> harmonics? I'd like to have some on hand to transmit on, for example, 3885, 
> 3880, 3875, 7290, 14286, etc. Any advice with specific examples would be 
> appreciated. Thanks & 73, Bill, w0ng 
> 
> You can use 160m rocks for 80m. IE: 1.940 becomes 3.880, and you can 
> even double 80m rocks. Color burst xtals @ 3.579xxxx become 7.160 
> (thereabouts). 
> 
> 40m rocks (like 7.100) become 14.2, 21.3, 28.4Mc. 
> 
> I would imagine that 14.5 would become 29, but then again, so would 
> 7.250Mc. :-) 
> 
> -- 
> Driving your AM Rig without a scope, 
> is like driving your car at night, without headlights. (K4KYV) 
> 
> -- 
> 73 = Best Regards, 
> -Geoff/W5OMR 
> 
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