Honeywell Pentax 1 / 21 Spotmeter

Brad Bireley

Subscriber

Joined

Mar 14, 2006

Messages

864

Format

Multi Format

• Jan 12, 2022

• #1

I have acquired a Honeywell Pentax 1 / 21 Spotmeter. What batteries that are made today will work? Thanks!

 

Donald Qualls

Subscriber

Joined

Jan 19, 2005

Messages

12,332

Location

North Carolina

Format

Multi Format

• Jan 12, 2022

• #2

I used to use zinc-air hearing aid batteries in mine, with a wad of foil to fill space and make contact in the battery compartment. Voltage is just right (1.35 V), but cell life leaves a little to be desired (however, if you can get them somewhere like Costco they're quite cheap).

More recently, I bought a PX625 converter -- uses a small 3V lithium coin cell and regulates the voltage to the required level. It limits current too much for the dial light to work, but cell life ought to be very good.

 

Galen Tieszen

Member

Joined

Dec 14, 2020

Messages

9

Location

Wellington, KS

Format

35mm

• Jan 14, 2022

• #3

I got a converter, as Don mentioned, and have been satisfied. I got mine from http://home.myfairpoint (dot ) net~snowleop/merc/640index.htm. It was designed specifically for the H/P Spotmeter. Or you can find them via google searching for "PX640 bettery replacement".

 

Donald Qualls

Subscriber

Joined

Jan 19, 2005

Messages

12,332

Location

North Carolina

Format

Multi Format

• Jan 15, 2022

• #4

Yes, I stand corrected, that's a PX640 converter, not PX625. I got this one as well: http://home.myfairpoint.net/~snowleop/merc/640index.htm Same site has some other interesting converters as well.

 

OP

OP

Brad Bireley

Subscriber

Joined

Mar 14, 2006

Messages

864

Format

Multi Format

• Jan 18, 2022

• #5

thanks!