Type of wire to use for shielded test lead....

** Probably be fine ,just cut one end off though - the 1/4 inch plug is needed !!! ** DMMs don't come with shielded leads, only scopes do.

.... Phil

Any shielded wire will work. Just be sure it is rated for the voltage you are going to measure.

Not being familiar with the Eico, but the 15 meg resistor seems very high. Maybe it is a 1.5 meg. The VTVM I have used a 1 meg resistor in the end of the probe.

You missed the part where it is a VTVM, not a DMM.

The old VTVMs I have seen often have a shielded probe.

It's 15 Meg.

--
"I am a river to my people." 
Jeff-1.0 
WA6FWi 
http:foxsmercantile.com

Ok, I see that the input impedance is 25 meg ohms where most are around

10 meg. That explains the difference.

Comparatively: That's 25,000 ohms/volt on the 1000 range. With 11 meg, it's only 11,000 ohms/volt.

Typical multi-meters like the Simpson are 20,000/volt, but at the 29 volt range, that's only 400 Kohms, which will load a high impedance source considerably more than the VTVM at either

11 or 25 Meg.

However, if you're using the 20 volt range for measuring AVC voltages, it's 1.25 meg ohms/volt.

--
"I am a river to my people." 
Jeff-1.0 
WA6FWi 
http:foxsmercantile.com

** I was particularly interested in the fact the Eico is a VTVM.

** Mainly because they are such wide band meters, covering the range up to several MHz. Most only have one input connector, a coaxial type, switched between DC and AC use.

However, the Eico has a separate DC voltage jack and that is the one the OP asked about.

Modern DMMs have similar input impedances to VTVMs ( like 10 or 11 Mohms) and full scale DC ranges starting from 2V rms.

So very comparable.

..... Phil

I had an EICO FET TVM. I still have it. D Cell for the ohmeter and a 9V battery for the voltmeter.

Mine had the phone plug as yours does and also. The probe was quite large in diameter and could turn to insert/remove the resistor (whatever value it was).

I think it was AC/Ohms and DC,

I doubt the cabeling matters and RG-58 would probably suffice.

If you keep your voltages down, RG174 is about 1/2 the diameter (0.1") of RG-58

RG58/59;

RG59 is TV stuff with a solid core.

RG174

is good for 1500 VRMS and it quite flexible.

If had to actually make a probe and it made a difference as to whether the resistor is in the tip or the plug, You can get a BNC for the probe end.

But then some of the standard probes could likely easily accommodate a series resistor inside. Especially some of the adjustable probes like these:

You can get RG174 and other cable by th foot. e.g.

The center conductor on RG174 is flimsy, RG-58 or RG-59 are somewhat more mechanically robust (but the insulation will have to be replaced, or spliced to a few inches of more flexible wire). For any non-RF work, microphone cable (shielded pair) might also be useful.