[TenTec] OT (that is Off Topic and Old Timers) BC-610

[Ken Brown]

Well, yes I know you can bias 833 to operate as a linear amp. I just 
don't know whether this particular unit had a setting for that. I got 
the impression that it was primarily a class C, CW or FSK unit. And I 
don't recall a modulator in the box. Just one pair of 833s for RF 
amplification.
>> There was also an amplifier often paired with the T-368 (and perhaps 
>> earlier with the BC-610) which used a pair of 833s in push pull, with 
>> plug-in tank coils, not band switched. I don't 
>> know if the pair of 833 could be operated as a linear amp, with the 
>> T-368 in AM, or if it could only be used for CW and FSK.
>>     
>
> Depends on bias and drive levels. In broadcast transmitters many a pair
> of 833s were modulated by a pair of 833s to give a KW AM output.
>   
>