RE: Yes but...

RE: Yes but...

Posted by Lois (A) on September 28, 2016 at 08:17:12

In Reply to: Yes but... posted by DavidLD on September 28, 2016 at 07:55:22:

That's my first meter, purchased and assembled in 1975. Still have it, likely works fine if the switches are cleaned.

The drawback for tube work is that its input resistance is 50K ohm/volt, the same I believe as the Simpson 260. This makes it hard to obtain accurate bias voltage readings at the high-resistance node of a grid, unless you do some on-the-fly extrapolation. The internal meter resistance forms a voltage divider with the grid resistor.

A DMM typically has a 10 meg input R. Nostalgia aside, easier to work with.

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Follow Ups Full Thread

Topic - Simpson multi meter follow up - gonzo 20:13:16 09/27/16 (19)

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Abe, thank you for the terrifically helpful post. - gonzo 11:27:06 09/29/16 (1)

RE: Abe, thank you for the terrifically helpful post. - AbeCollins 14:52:55 09/29/16 (0)

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RE: He has a good digital tho in his Fluke - airtime 19:07:03 09/28/16 (1)

RE: He has a good digital tho in his Fluke - Michael Samra 12:16:35 09/29/16 (0)

RE: Simpson multi meter follow up - caffeinator 08:22:10 09/28/16 (0)

RE: Simpson multi meter follow up - maxhifi 07:19:11 09/28/16 (0)

RE: Simpson multi meter follow up - airtime 07:07:56 09/28/16 (2)

Yes but... - DavidLD 07:55:22 09/28/16 (1)

RE: Yes but... - Lois 08:17:12 09/28/16 (0)

RE: Simpson multi meter follow up - Alpha Al 06:24:29 09/28/16 (0)

RE: Simpson multi meter follow up - FenderLover 21:50:09 09/27/16 (0)

Follow Ups

RE: Yes but... - Lois 08:17:12 09/28/16 (0)

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