[ARC5] Old Navy Tube Numbers

[Geoff]

Subject: Re: [ARC5] Old Navy Tube Numbers


>
> ----- Original Message ----- 
> From: "Geoff" <geoffrey at jeremy.mv.com>
> To: <WA5CAB at cs.com>; <arc5 at mailman.qth.net>
> Sent: Tuesday, November 13, 2012 6:44 AM
> Subject: Re: [ARC5] Old Navy Tube Numbers
>
>
>>
>> Subject: Re: [ARC5] Old Navy Tube Numbers
>>
>>
>>> Likewise in the I-177 settings booklets.
>>
>> That assumes that one has a military tester and/or the manual. The cost
>> today of a I-177, TV-7, etc would scare many off as the audiophools have 
>> put
>> them out of reach of many.
>>
>>
>>>
>>> The Navy Type Number to commercial list is in the OQ-2 manual that 
>>> someone
>>> posted a link to.  It was an easy download.
>>
>> Youre welcome.
>>
>    The translations to standard type numbers is, of course, useful for any 
> tester or just to know what the tubes are.
>    I agree about the price of tube testers, they are ridiculous. I was 
> very lucky to have obtained mine, including a decent TV-7 ages ago when 
> they were cheap.
>    Beside the TV-7 I have a good Weston tester that is more convenient 
> because it will test multi-section tubes without resetting the selectors. 
> However, it does not have a gas check. I also have a couple of other 
> testers but they have problems. One is the kind that uses punch cards but 
> I don't have many of the cards which limits its usefulness.
>
>
> --
> Richard Knoppow
> Los Angeles
> WB6KBL
> dickburk at ix.netcom.com


I have a Hickok 752A that cost me $20-25 at the National final IRS auction 
in 1992, it still has the ID tag and might have even been the one I used in 
the Service Dept in the 60's. Its the go-to tester for service work to cull 
out shorts, intermittents and gas leakage before I even turn a unit on. 
Substitution has the final say.

A friend with a 2 way radio shop gave me a TV-7C/U (he hadnt seen a tube 
radio in years) that works fine after a full overhaul and brings back 
recollections of dragging one around in my USN days....usually with a 
URM-25D hanging from the other arm. It is used mostly to show pretty 
pictures for Fleabay ads since it is an audiophool "standard".

I did pick up a clean I-177 at a local hamfest (Nearfest)maybe 5 years ago 
for $40 minus the adapter. Its also used to show pretty pictures for Fleabay 
ads of older tubes.

And having heard/read about Jackson testers, curiosity and being somewhat of 
a pack rat, a 648S minus cover followed me home from another junquefest (MIT 
Fleamarket) for $20 a few years ago. After an overhaul it compares very 
close to the 752A and its used mainly to cull out all the TV sweep tubes 
that have no hope of being useful in a RF circuit.