[Johnson] Viking II on WARC bands?

[WQ9E at btsnetworks.net]

In addition to what Carl has already stated we have to keep in mind that a lot of these Johnson transmitters were built from kits so the driver that is stable running straight through on 10 Mhz. in one Viking II might not be true for another example of the same model.

5.0 to 5.5 Mhz. is the most common frequency for external VFOs used with SSB transceivers so many hams already own a good stable source of ~5 Mhz. RF.  Some/most of these might require an additional buffer stage to generate enough drive.

Rodger WQ9E

-------- Original Message --------
> From: "Carl" <km1h at jeremy.mv.com>
> Sent: Wednesday, February 22, 2012 7:45 PM
> To: "Bry Carling" <bcarling at cfl.rr.com>, <wrcromwell at gmail.com>, <johnson at mailman.qth.net>
> Subject: Re: [Johnson] Viking II on WARC bands?
> 
> Its basic transmitter design in place for decades in that the driver is not usually neutralized since it is a multiplier on the higher bands and so neutralization isnt needed. The question is at what straight thru frequency does the driver take off on its own?
> 
> The Viking I and II manuals state that fundamental crystals may be used on 160 to 40 and 7mc crystals for 20. For 10M 14mc crystals may be used.(but not on 20M)
> 
> Since 30M is between 40 and 20 its anyones guess what will happen especially in a kit built rig when running the driver straight thru. Each rig may react differently.
> 
> Carl
> KM1H
>