[Milsurplus] Need 4000/4(or 8) ohm audio transformer to use with a BC-324N

[Jim Whartenby]

Greetings John
Isn't that a BC-342N?
The transformer you need is a 70.7 volt line to 8 ohm audio transformer.  They have a multi-tap primary that is labeled in watts.  The secondary is labeled 8 or sometimes 16, 8 and 4 ohms.  Use the 1.25 watt tap and common as the connection to the radio.  This will give you a 4000 ohms to 8 ohm transformer.

See for yourself:
70.7 volts squared divided by 1.25 watts = 4000 give or take a few ohms.
Regards,
Jim
--- On Tue, 9/8/09, John Flood <kb1fqg at yahoo.com> wrote:

> From: John Flood <kb1fqg at yahoo.com>
> Subject: [Milsurplus] Need 4000/4(or 8) ohm audio transformer to use with a BC-324N
> To: milsurplus at mailman.qth.net
> Date: Tuesday, September 8, 2009, 11:49 AM
> Greetings all,
> 
> I rescued a pretty ugly BC-324N and have it running now. 
> Lucky most of the ugly was just dirt and the front panel
> cleaned up quite well!  but the case will need a
> repainting.  If I recall correctly, the speaker output is
> 4KOhm and was wondering if any one had a transformer hanging
> around so I could use 4-8 ohm speakers with it.  I could
> offer cash or even better, tested vacuum tubes in
> exchange.  Would be willing to offer 2-3 times worth of
> tubes in exchange but cash OK as well.  Also, if I am wrong
> with the output impeadance please let me know.  
> 
> I had my 6 year old Son listening to it on a pair of
> headphones and we found a Chineese broadcast and he got all
> excited and listened to it while he ate breakfast before
> school!  Looks like there is hope for #2 son and
> radio!  He was so excited It prevented me from harm by the
> wife for leaving it on the kitchen table the night(well
> morning) before when I crawled up to bed.
> 
> John Flood  KB1FQG
> 978-979-2807
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