[Boatanchors] Another Unusual Part

Tom Chesek tchesek at epix.net
Tue Aug 27 07:39:00 EDT 2013

I possess two sets of these solid state devices.  During the 70's I 
assembled a Heathkit IM-18 VTVM.  My father owned a Heathkit V-7A which he 
assembled late 50's/early 60's.  When Heathkit offered the solid state 
upgrade we both purchased them.  Dad passed away in 2001 so I now own 2 
Heath VTVM's with this upgrade.  The upgrade was called "Vacuum-Tube 
Voltmeter Modification Kit" designated "Model IMA-18-1"  The TR1119 SS 
Triode (replaces 12AU7) is Heath part #150-58 and the TR1002 SS Diode 
(replaces 6AL5) is #150-57.  The instruction sheet does not contain any 
schematic or internal information about the devices.


-----Original Message----- 
From: Chuck McGregor
Sent: Monday, August 26, 2013 11:12 PM
To: Wilson
Subject: Re: [Boatanchors] Another Unusual Part

I believe that pair was intended to convert a classic VTVM to solid state.
Chuck K7MCG

On Mon, Aug 26, 2013 at 7:29 PM, Wilson <infomet at embarqmail.com> wrote:

> http://www.head-fi.org/t/454647/head-direct-ef-5-headphone-amplifier/195
> Found in company with the TR1002 (SS 6AL5), a TR 1119 solid state 12AU7.
> Any buyers out there?
> Wilson
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