RD Instruments Model 1575 Tube Tester??

[peter, sr. a. wokoun]

I recall R.D. were the initials of Mr. Hickok...
Hmmmmm.......Coincidence or not?

On Sun, 3 Jan 1999 17:23:23 -0500 Larry Wolken <rhys at IX.NETCOM.COM>
writes:
>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.
>
>At any rate you've got a winner. Don't forget Bill Waters
><wate at erols.com>
>in Frederick Md. is one of the leading repair and recalibration people
>in
>the country for Hickok tube testers.  He's fond of saying if the
>meters are
>working, he can bring it back to life.
>
>Enjoy it.  While it's not plug and play by today's standards and may
>take a
>few minutes to set up for each tube, it's a wonderful piece of
>equipment.
>
>Larry Wolken N3OJD
>
>=========================================
>
>At 01:19 PM 1/3/99 -0600, Tom Norris wrote:
>>I posted this earlier this week, but no replies.
>>After looking around, turns out the RD Instruments 1575
>>is the same as a Hickock 539. At least physically the front
>>panel looks very similar to the 539 or the 700. Had not even
>>heard of RD Instruments until I saw this tester. Even says
>>Hickock on the lable, under RD instruments. Maybe a 539
>>that will do a little more? It is in a metal case rather than the
>>black covered wood case a 539 or 700 has.
>>
>>Is this unit another "Tom has the only one in existance and no one
>>else has ever heard of them" thing like that Mars Electronics
>>SSB RX convertor? heehee.
>>
>>>( my preivious post )
>>>Nifty tester, almost as large as a TV-2, with a seperate line
>voltage meter
>>>and an adjustable bias meter that doubles as a current meter for
>testing
>>>VR tubes. Roll chart on bottom. Half the weight of a TV-2!!!
>>>
>>
>>Thanks all
>>
>>Tom
>>
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>
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