[ARC5] 80 KHZ IF

[frledda at att.net]

The National FRR-59 / WRR-2 used 80kHz IF with crystal filters. IMO, the best sounding SSB ever!

 

Best, Francesco K5URG

CCA President

 

From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> On Behalf Of Dennis Monticelli
Sent: Tuesday, February 2, 2021 10:47 AM
To: Robert Eleazer <releazer at earthlink.net>
Cc: ARC-5 Maillist <arc5 at mailman.qth.net>
Subject: Re: [ARC5] 80 KHZ IF

 

Not at all uncommon for the high-end of a model range in that era to have a low final IF.   Those short wave radios were double and sometimes triple conversion.  I used a Hammalund HQ-170 way back when that had triple conversion with IFs of 3035, 455, and 60.

 

Dennis AE6C

 

On Tue, Feb 2, 2021 at 5:53 AM Robert Eleazer <releazer at earthlink.net <mailto:releazer at earthlink.net> > wrote:

I recently augmented my collection of National receivers with an NC-300.  I previously have done quite a lot with the Cosmic Blue series of receivers, specifically the NC-155, NC-270, and NC-190, and was quite surprised to see that while the NC-300 had the same first IF as those other sets, 2215 KHZ, it has an 80 KHZ 2nd IF.

 

Of course I at once thought of the BC-453 and similar command sets, with its 85 KHZ IF.  I had no idea that any HF receiver used that low an IF.  How common is this?  Was the BC-453 use as Q5er the inspiration for this?

 

Wayne

WB5WSV    

 


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