[Boatanchors] Drake 2A vs 2B

[WBob]

I thought the "B" had a variable bandwidth and varable tuning IF filter where 
you could select any selectivity you wanted from 3.6 to .5 and put it where you 
wanted. One of the very best receivers ever built.

Bob, WB6JPI

Al Klase wrote:

> Greg Mijal wrote:
> 
>> What are the differences between the two models?
> 
> 
> Greg
> 
> Per the synopsis in Osterman's "Shortwave Receivers Past and Present," 
> The A had IF selectivities of 4.8 and 2.4 KHz. The B tightened things up 
> to 3.6 and 2.1 and added a 0.5 position for CW.  Minor changes in tube 
> lineup suggest there were a couple of tweaks, maybe in the AVC.
> 
> Regards,
> Al
>