[GreenKeys] period HF receivers

[Jeffrey D Angus]

On 5/8/2017 2:14 PM, Richard Knoppow wrote:
> Also do not forget the Collins 51J series, these are very fine
> receivers. The 51J-4 has mechanical filters in it so is considerably
> more expensive than the earlier versions but the earlier ones can
> be used with an external SSB or RTTY adaptor which will supply
> the selectivity. 
I have a 51J-3. What makes the difference is have the product
detector kit installed from Tree Top Circuits.
<http://www.ebay.com/itm/222493257886>
They also have the kit for the R-390/390A
<http://www.ebay.com/itm/222493260192>





-- 
Jeff-1.0
wa6fwi
http://www.foxsmercantile.com


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