[Heathkit] Solid State VOM model IM-25 Help needed

[Walt - WB2VSJ]

Mercury batteries are no more.  Closest you can get is a hearing aid battery
at 1.45V (Zinc Air) but they don't last too long.  That battery is also used
to bias a transistor in addition to providing a 1.35 V reference  for the DC
calibration. 

I was going to use something like this in a few of my meters that also used
mercury cells:

http://www.ebay.com/itm/5pcs-LM2596s-DC-to-DC-Buck-Converter-Adjustable-Powe
r-Step-Down-Module-/281436507027?pt=LH_DefaultDomain_0&hash=item4186ec4b93

Walt - WB2VSJ


-----Original Message-----
From: Heathkit [mailto:heathkit-bounces at mailman.qth.net] On Behalf Of David
Sent: Wednesday, April 08, 2015 19:51
To: Heathkit at mailman.qth.net
Subject: [Heathkit] Solid State VOM model IM-25 Help needed

Greetings. I was at a junk flee market in Yuma where I found the IM-25.
What I would like to know is what is being used to replace the 1.4 volt
Mercury calibration battery. The one in this unit I got is dead.
Thanks for any help you can give me.

Dave    VA7DG 


______________________________________________________________
Heathkit mailing list
Home: http://mailman.qth.net/mailman/listinfo/heathkit
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Heathkit at mailman.qth.net

List Administrator: Duane Fischer, W8DBF
** For Assistance: dfischer at usol.com **


This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html