[ARC5] [Milsurplus] Tube Tester

[Dennis Monticelli]

I have but one tube tester but I can vouch for it as being able to test a
wide range of tubes.  It's the Hickok 752A.  It uses the standard Hickok
emission test system but has other features such as good support of VR tube,
nuvistors, a sensitive metered leakage test and a single button swap of dual
triode section for making quick comparisons.  It is also easy to figure out
how to test tubes that have no tube chart data because the tube elements are
clearly represented by unique switches.  This is handy for the old tubes
where chart data is sometimes missing but the full range of sockets are
there.  All you have to do is figure out the settings.  I don't know what
752's go for these days.

Dennis AE6C

On Sun, Jul 12, 2009 at 3:25 PM, Kenneth G. Gordon
<kgordon2006 at verizon.net>wrote:

> On 12 Jul 2009 at 15:07, Bob Macklin wrote:
>
> > The Heath TT-1 is the only dynamic tube tester that heath ever made.
> > They don't come cheap.
>
> You can say THAT again!
>
> I just checked eBay: there is ONE Heathkit TT-1 for sale
> today, and the Buy-it-now price is $499.99, about
> equivalent to the Hickok 539(*)s being sold today.
>
> BTW, Hickok patented the Dynamic Mutual Conductance
> method of testing tubes, and, as far as I know, any other
> manufacturer who used the same method had to pay
> Hickok a fee.
>
> Jackson Brothers then designed a similar method in direct
> competition to Hickok, and patented THAT, selling its
> method to some few other companies.
>
> You can usually tell those testers that use the Jackson
> system since they cannot call them "Dynamic Mutual
> Conductance" testers after Hickok patented their design.
> Most of those Jackson system testers I have seen say
> something like "Dynamic Tube Tester"
>
> The TV-2 series uses the Hickok system, although most of
> those were built for the military by Victoreen.
>
> I don't know who made the '177 military versions. Maybe
> someone else here does.
>
> Ken Gordon W7EKB
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