[Boatanchors] Hammarlund Pro 310 Rcvr on eBay

[WQ9E at btsnetworks.net]

I have one and I can confirm that I went through a couple of new 6C4 tubes to find one that worked well in the receiver so it is a true Hammarlund.

The greatest restoration issue was cleaning and lubricating the tuning mechanism followed by the restringing of those special drive cords.  

Performance is OK.  I got mine for a good price locally and at that price it scores OK on the performance per dollar paid ratio but if you had to purchase it at ebay auction pricing I have a feeling a S-19R would provide a much better performance per dollar ratio :)

One oddity is that it is single conversion on the low frequency ranges (below 2.2 Mhz) with its very low 52 khz. IF but I haven't noticed any images.  I came across this while I was restoring it and thought I might end up with the only communications type receiver that suffered from poor image rejection on the broadcast band.

Rodger WQ9E


> 
> 
> Its performance on the higher frequencies was unspectacular due to the 
> losses in the double tuned front end and obsolete 6BA6 RF amp that followed 
> and the usual noisy 6BE6 mixer. The apparent customer base was not the ham 
> market which demanded the highest possible sensitivity.
> 
> I wonder if it had the same 6C4 problems that the HQ's suffered?
> 
> Carl
> KM1H
> 
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