[GreenKeys] period HF receivers

[Bruce Gentry]

On 5/11/17 9:45 PM, Jim Haynes wrote:
> On Thu, 11 May 2017, Bruce Gentry wrote:
>
>> the receiver. The fact a homemaker could use the same receiver, 
>> especially
>> if the good loudspeaker and a turntable was with it, to listen to 
>> daytime
>> entertainment broadcasts, records, and the audio of low band VHF 
>> television
>
> The Hallicrafters SX-28 (late 1930s) and SX-28A (1940s) had a jack in the
> back of the receiver for a phono input, and the audio output stage was 
> push-pull 6V6s to drive some serious loudspeaker.
>
>
> Some Nationals and Hammarlunds both pre and post war also had phono 
> inputs and push pull 6V6s.  To my knowledge, only the Hallicrafters 
> SX-42 and 62 also included coverage from 30 MC to at least the top of 
> the FM broadcast band and FM detection above 30 MC. They could receive 
> all FM stations including the  old band which wasn't completely 
> vacated until about 1950.  They were probably the best known and most 
> popular "all purpose" receivers for their time. Hallicrafters offered  
> high fidelity loudspeakers to go with the receivers.  Hammarlund 
> offered a pre-war console radio based on the Super Pro, but the BFO 
> was not adjustable, operated only when a push button was pressed, and 
> intended  as a tuning aid. I don't know of any high fidelity 
> loudspeakers produced by National.  One thing I never quite understood 
> was teenagers in the late 50s not persuading their fathers to let them 
> use the  now idle 1940s Hallicrafters or National from the ham shack 
> in their bedrooms now that Dad had a new  (Collins?) SSB receiver. An 
> SX-42 with the matching loudspeaker and a turntable would have been 
> far better than the All American Five table radios and phonos most 
> teens had.  The kids were rarely refused if the SX was sitting on the 
> shelf gathering dust, they just didn't ask. Add to this all the big 
> pre-war console radios that were trashed in the early 50s to make room 
> for TVs, long before the kids could use them in their rooms for 
> rock-n-roll.  A lot of good rigs sat silent or were trashed before 
> they could have a second life.

       Bruce Gentry KA2IVY