[AMRadio] Johnson Thunderbolt Amplifier

Mahlon Haunschild mahlonhaunschild at cox.net
Tue Jan 5 19:27:10 EST 2010


It is definitely a pre-NEMA-standard twist-lock connector, rated for 15A 
125/250V (hot-hot-neutral).  Note that there is no safety ground through 
the connector, and the neutral is required for the T-bolt (but you knew 
that) so you can't in theory safely replace everything with a  NEMA 
L6-20 or similar.  The closest modern equivalent would be a NEMA L10-20 
but you'd have to replace the chassis receptacle to do it and, in any 
case, I have no idea if the shell size is small enough to fit into the 
existing hole.  Plus I have no idea if anyone actually makes these.

OK, now that I've been around Robin Hood's barn on this, I do have one 
that I can spare.  Please contact me off list.


Mahlon - K4OQ

> ------------------------------
> Message: 2
> Date: Sun, 03 Jan 2010 23:11:33 +0000
> From: r.kovach at att.net
> Subject: [AMRadio] Johnson Thunderbolt Amplifier
> To: AMRadio at mailman.qth.net
> Message-ID:
> 	<010320102311.8129.4B412425000C7E9700001FC122230682229B0A02D29B9B0EBF080C0E900105D29D at att.net>
> Content-Type: text/plain
> I am looking for the twist lock AC power cord for the Johnson Thunderbolt amp. It appears to be a non standard size. Any info on a source or part number would be helpful. Thanks..Bob..W6KYM

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