[ARC5] BC-230 meter repair?

[Ian Wilson]

I have a greatly modified GF-11, which fortunately has a working meter,
black-faced, OK it's 2A full scale and the BC-230 is 1.5A but that's
close enough. Will swap the two meters sometime.

The GF-11 modifications (this is the 2x837 version) look well done -
there is a small c/o relay built in and the front panel sports two extra
switches and a microphone socket. There are two antenna connections
on the rear (none on the front panel), one routed through the relay.
Have a GF-11 coilset, nice cond, not useful here, anyone want to trade for
a 40m coilset (or sell me a dead one that I can hack up)?

73, ian K3IMW




On Mon, Aug 4, 2014 at 1:47 PM, Kenneth G. Gordon <kgordon2006 at frontier.com>
wrote:

> On 4 Aug 2014 at 12:13, Ian Wilson wrote:
>
> > Assuming that the RF ammeters respond to DC, my BC-230
> > has a defective meter.
> >
> > Is it worth trying to fix this? I assume there is some sort of
> > heating element/thermocouple arrangement inside.
>
> From what I have learned, all RF ammeters of that period were
> thermocouple types.
>
> There was a very good article published in Electric Radio Magazine by a VK
> or a ZL on rebuilding those meters. He had excellent success with them.
>
> The article is in Electric Radio Magazine #243, August 2009, page 2 by
> Robinson, entitled "Making Thermocouples for Aerial Ammeters"
>
> Ken W7EKB
>