[AMRadio] Johnson Valiant Crystal Control Question


w0ng at comcast.net w0ng at comcast.net
Sun Sep 9 19:50:37 EDT 2007


Hey Jim,

Thanks for the tip on using a 6.050 crystal for 17 meters. Interesting idea for sure. I'm thinking the 15 meter position on my Valiant would work with that crystal. I'll certainly check it out!

73
Bill
w0ng

-------------- Original message -------------- 
From: Jim Candela <jcandela at prodigy.net> 

> Bill, 
> 
> Also consider 6050 for use on 17m at 18150. I know this works on the Viking I 
> when the bandswitch is on 20 or 15m (don't recall which). The Viking I or II has 
> the advantage of a continuously tuned output pi-net whereas the Valiant likes to 
> stay closer to ham bands of that era. 
> 
> 17m has been pretty active these days. Maybe we need to make a presence there on 
> AM.... 
> 
> Jim 
> 
> ----- Original Message ---- 
> From: "w0ng at comcast.net" 
> To: amradio at mailman.qth.net 
> Sent: Sunday, September 9, 2007 4:52:26 PM 
> Subject: [AMRadio] Johnson Valiant Crystal Control Question 
> 
> 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 
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