[ARC5] BC-348

[howard holden]

I use mine, and it has special significance for me because I, my older brother, and father all learned code copying W1AW on it back in the early 60s. All made our first Novice contacts with it in 61 as well. Dad bought it while I was still in diapers, and I believe it was his first electronic project. Been in the family near 70 years. 

73, Howie WB2AWQ

Sent from my iPhone

> On Dec 30, 2019, at 14:21, Jim Haynes <jhhaynes at earthlink.net> wrote:
> 
>> On Mon, 30 Dec 2019, Whitebear1122 wrote:
>> 
>> Boy those 348’s are gorgeous.  Does anyone here actually use theirs on the ham bands?
> 
> Well I did circa 1958.  Those were the favorite receivers of the late
> Bob Weitbrecht, W6NRM/W9TCJ, one of the RTTY pioneers.  He developed
> a mod where he used the IF transformers from the LF/MF Command Set
> receivers to get a narrow passband.  He converted the 915 KHz IF down
> to 85 KHz, put it through the transformers, and then converted it
> back to 915 KHz and back into the original IF chain.  A neat feature
> of this is that you get passband tuning by varying the frequency of
> the conversion oscillator.
> 
> Mine was eventually extensively modified.  I adopted Bob's narrow band
> IF scheme, but instead of the IF transformers I used a bandpass filter
> found at a surplus store in Chicago.  Then I made a new rack-mount front
> panel, and added a chassis on the back to hold the AC power supply and
> the IF filtering and also a product detector.  This was used for a few
> years until Bob discovered the Drake 2-B receiver and persuaded me to get
> one too.  But I missed the general coverage that the BC-348 offered -
> back then there was a lot of copyable RTTY outside the ham bands.
> 
> Jim W6JVE
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