[Heathkit] HW-7 Repair follow up.

[Garey Barrell]

Hi Kevin -

Yeah, it's a 36V Zener, probably 1W.  It's there to protect the output 
transistor from high peak voltages, usually caused by a mismatched 
load.  You  _can_  run without it, if you only drive a matched load, but ...

You can roughly gage the size by the physical size.  If it's about the 
size of a 1N4007 PS diode, it's 1W, which would be a 1N4753 or 
equivalent.   If it's bigger, like a 1N5408 PS diode, it might be a 5W 
Zener.  Those are a lot harder to find, a 1N5365 or equivalent.

73, Garey - K4OAH
Atlanta

Drake 2-B, 4-B & C-Line Service CDs
<http://www.k4oah.com>



Kevin GraY wrote:
> The Zener Diode has 56-55 on it and the book says it is a VR-36A zener 
> diode.  Any info on a replacement is appreciated.
>
> Kevin
>
>
>