VTVM Mod

[J.Douglas Hensley]

Ray,

The substitutes were sold as IMA-18-1 which replaced the 6AL5 and 12AU7.
According to their add, one device was a high voltage amplifier
containing 4 FET's and the other contained 2 special diodes with low
forward drop.  Claimed benefits were instant on, no warm up so no pointer
=-drift re-zeroing.  Problem is, its then no longer a BA.  73, Doug

On Mon, 23 Feb 1998 19:28:01 -0800 "Ray Allen, Sr., W2KBR/3"
<raallen at erols.com> writes:
>Group:
> Seems to me I remember a Heath mod kit for their VTVMs which allowed
>for a "solid state" plug-in to be used in place of the 2 Tubes in
>their meters.  Anybody remember that?   es 73 Ray
>--
>Ray Allen, Sr., W2KBR/3
>8303 Grainfield Road
>Severn, Maryland, 21144-2331
>
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