HW-101 Step 2

[wa1vwl]

My Fluke 8060A DVM spec sheet says it's greater than 10,000 MOhms,
typically 80,000 MOhms. However I've seen many at 10 MOhm and even some
low cost ones around 1 MOhm. But, you see, it's not that important when
measuring high voltages. It's only important on those high impedence
circuits. A typical 20,000/volt VOM with a let's say 500 volt scale
would be 10 MOhm but on the 5 volt scale it would be 100 KOhms.

73/Gerry/W1ID

Clark, John wrote:
>
> OK. The consensus is that the 307 I'm reading is "OK" and
> may be no more than the difference in time and voltage between
> 117 and my 121, and who knows what the ohms per volt of the meters
> then and today.
>
> What do you think my LCD meter is? It is not listed.
>
> The tubes should be OK.  They have been in & out. I have
> a B&K DYNA JET tester and replace 5 last week. Replaced the El Menko
> 12AT7 at V17 & V19 with Philips.
>
> OBTW there is a place here in Denver that still has a good stock of
> tubes, and sells them at a fair price.  Fistell's Electronics Supply Co
>  (303) 629-1312  Even match pairs for some types.
>
> Looks like I need to do the R106 modification, as my zero point on the
> S meter moves after about 20 minutes.
>
> Later.
>
> JWC
> N0URE
>
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