[ARC5] My ARC-5 40 meter station

David Stinson arc5 at ix.netcom.com
Mon Feb 23 09:21:43 EST 2015


----- Original Message ----- 
From: "Dennis DuVall" <duvallddennis at gmail.com>

>Yes, the ARC-5s were plate and screen modulated but ran low 
>screen  voltage so didn't get any more power out than the 
>SCR-274N.  Probably  easier to tune up, though.  Would be 
>interesting to up the screen  voltage and see just how much 
>undistorted audio one can get out of an  MD-7.  Very small 
>modulation xformer in the thing.

Have a care; there's a special spike-killer resistor across the
secondary of the mod tranny specifically to limit excursions in
the winding and you defeat it at your peril.
We can't buy these mod trannies at WalMart and I donated
my last spare to an MD-7 rebuild for an old friend.

73 DE Dave AB5S



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