[MTM]

Hello............NG..
Might anyone know anything about a:
R&D Instruments model 1575 Tube Tester..?

Is it the same as...?

Hickok.....539...B or C..?

Pix available.......Thanks


Thanks........Mike..........
814-450-7979-c




R&D Instruments model 1575 Tube Tester..?

[Peter Wieck]

On Jan 31, 5:53 am, "MTM" wrote:
Hello............NG..
Might anyone know anything about a:
R&D Instruments model 1575 Tube Tester..?

The information below is from the Boatanchors NG, specifically Larry
Wolken. It is accurate.
__________________________________________________
Around 1960 Hickok introduced the high end RD Instruments line ("For
Research and Development"). I suspect it was a bit of a marketing
ploy to
take advantage of the post Sputnik hysteria. Some of the items in
this
line were nearly identical to the regular line - hence the 539B and
the
1575 - and some were unique to the RD line. I used to own a model
1600
VTVM which was quite pricey in 1960 at $245. It used lab quality
components throughout.

The 1575 as near as I can tell is quite similar to the 539B although
there
are several noticable differences. The catalog blurb mentions a
voltage
regulator test not mentioned in the 539B copy. And their prices are
nearly
the same also -- $415 vs $445 for the RD model.
__________________________________________________ _

Note that this tester is one of the few that is set up (with the
addition of a VOM) for direct matching of tubes as it has plate and
filament current taps; and it has taps for outside bias voltage.

Peter Wieck
Wyncote, PA

[Alan Douglas]

Hi,
The 1575 is the RD Instruments version of the Western Electric
KS-15750. It's not a 539.

Alan