[Boatanchors] Gonset,GSB-201 (3340) Amplifier

[D C *Mac* Macdonald]

Hi, Olaf! 
 
You have simply run smack dab up against a major 
problem with the modern "no-tune" solid state rigs. 
They simply DEMAND a 50 Ohm resistive load that 
presents a low level of reflective power to work. 
 
Most (but not all) of the older tube final amp 
transceivers had considerable latitude to match 
the untuned input of many of the early linear 
amplifiers. 
 
One tube type amp that is easy to drive is a National 
NCL-2000 which runs in a grid-driven Class AB mode 
and untuned resistive load input circuitry. It gives 
a 50 Ohm load for your transceiver at all times. 
  
* * * * * * * * * * * 
* 73 - Mac, K2GKK/5 * 
* (Since 30 Nov 53) * 
* Oklahoma City, OK * 
* USAF, Ret (61-81) * 
* * * * * * * * * * * 
 
 
 
 
 
 

> From: olaf at carolina.rr.com
> To: boatanchors at mailman.qth.net
> Date: Sun, 13 Nov 2011 15:25:49 -0500
> Subject: Re: [Boatanchors] Gonset,GSB-201 (3340) Amplifier
> 
> Hi Fellows,
> 
> Terrific response,and I thank all of you for the input----I was able to 
> check the many good suggestions and it boiled down to the mis-match from 
> the transceiver,----I am using a Kenwood TS-940 with a buit in Antenna Tuner 
> to drive the Gonset (I normally do not use the tuner for my antennas or 
> other amps )
> 
> Once I matched the Input of the Gonset amplifier for 80 mtrs with the tuner 
> in the 940,all was well and I get the same output,plate current etc as on 
> the higher bands.
> 
> BTW,the Wattage readings are not done with a Bird wattmeter,most of the time 
> I still use a lightbulb, my 1950 method,hi.
> 
> Now I have to figure out,how to get a''tuned input for 80 '' into the Gonset 
> so I don't have to fiddle with the tranceiver every time.
> 
> Agn,vy tnx--Olaf,KF4TP--