[MRCA] [ARC5] Vintage LF/MF Fun with my BC-453B

[Mark K3MSB]

HI Dennis --

I've found that under 180V plate produces a notable drop in performance.
 I was surprised that 72 V B+ even worked!

Mark K3MSB

On Wed, Nov 19, 2025 at 4:15 PM Dennis Monticelli <
dennis.monticelli at gmail.com> wrote:

> Mark,
>
> That is a fun thing to do.  10 yrs ago I did the same thing with a rebuilt
> BC-453B.  One tip I will pass along is to use batteries if you can,
> especially the B+.  I ran eight 9V batteries for B+.   Divorcing the
> receiver from the AC line reduces noise pickup from all the crud that
> modern electronics dump into the line.  It was a significant difference in
> my situation.  Also if you haven't already, adjust the IF transformers for
> looser coupling by pulling up on the tabs.  This will reduce the noise BW.
>
> Dennis AE6C
>
> On Wed, Nov 19, 2025 at 12:25 PM Mark K3MSB <mark.k3msb at gmail.com> wrote:
>
>> Hi Everyone
>>
>> For the past 2 years I've been using my RBA receiver for vintage LF/MF
>> fun, and have logged over 200 NDBs each year.   This year I decided to use
>> my BC-453B receiver.   It's been recapped, and all out of tolerance
>> resistors (sans one....) have been replaced.
>>
>> [image: image.png]
>>
>> Since early November,  I've logged 52 NDBs.   I'm hoping to log 100 this
>> listening season (which runs through March).
>>
>> 73 Mark K3MSB
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