[ARC5] Undoing a BC-453 conversion

[Jerry B.]

I have modified a several ARC-5's over the years with success.

Recently I picked up a R-25/ARC-5 (1.5-3.0 MC) which has been butchered
somewhat.
Question is, Is it feasable to replace the dynamotor and rear connectors to
original? I notice they are pressed in and usually get damaged when removed.

2 choices: Either complete the modifications or attempt to resore to
original.

Jerry
N6AJ



-----Original Message-----
From: arc5-bounces at mailman.qth.net
[mailto:arc5-bounces at mailman.qth.net]On Behalf Of Ian Wilson
Sent: Wednesday, March 09, 2005 9:53 AM
To: arc5 at mailman.qth.net
Subject: [ARC5] Undoing a BC-453 conversion


I recently obtained a BC-453 in quite nice condition, apart from a
couple of modifications:
  - Se rectifier + various electrolytics in dynamotor area (I will just
remove these)
  - 12H6 instead of 12SR7

I had hoped that the 12H6 simply replaced the one diode of the 12SR7
that's used. In that case, I would only have needed to restore the
original connection to the 12SR7 grid. However, the modification appears
more extensive than this.

Was there a popular modification that used both diodes in a 12H6,
perhaps for delayed AGC?

I would like to restore the BFO function (and the original detector, I
guess).

I'm only just starting down the ARC-5 road so would appreciate any
information.
I do have access to typical RX schematics, but haven't located one
specific to the BC-453.

Thanks!

--ian, K3IMW



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