[R-390] TJ311M01 sighting at Shelby

[Mahlon Haunschild]

Forgot to mention:  Rubber-stamped on another side of the boxes is what 
appears to be the FSN:  5905-502-4840

regards,

m.

Mahlon Haunschild wrote:

> I quote:
> 
> 3Z6925-19.3
> 1 EACH
> RESISTOR, CURRENT
> REGULATING
> TJ311Mo1                 (NOTE: yes, that's a little "owe" not a "zero")
> 11412-P-54-59 (51)
> MFG BY VICTOREEN INST.CO.
> DATE PKD : 3/56
> 
> Apparently this was a US Army contract; the tubes are lettered "US ARMY" 
> as well.
> 
> I'm guessing here, but it seems to me that the usage of the little "owe" 
> was to denote a "zero" whereas an upper case "owe" would denote an 
> actual "owe".
> 
> Cold DC resistance:  12.4  / 12.6 ohms
> 
> regards,
> 
> Mahlon - K4OQ
> 
> eldim at att.net wrote:
> 
>> Hello Mahlon and group members,
>>
>> This is indeed a surprise and maybe a new thread that requires futhur 
>> investigation.  This Part Number #TJ311M01 is listed  in the 
>> R-390A/URR Operators Manual TM11-5820-358-10, Dated 16 Jan 1961 on the 
>> pictorial page showing the spares and accessories (FIG-5). The FEDLOG 
>> crosses this part to the 3TF7  (RT510) which is the Ballast Tube or 
>> the official name "RESISTOR, CURRENT REGULATING", that is most 
>> commonly identified and found in the R-390A IF Deck. TM'S 
>> 11-5820-358-20P, Dec 77, and -34P , Dec 77, both show RT-510 with the 
>> same federal stock number of 5905-681-4707 and the Part Number 
>> SMB283222.  The military SMb Part Number would most likely ONLY show 
>> up on the military packaged product and not on the part. The question 
>> that I have is "WHEN WAS THE FIRST R-390A/URR MANUFACTURED". The -10 
>> TM shows that the 16 Jan 61 TM supersedes so much of TM 11-856A, 20 
>> Jan 1956 plus Change 1, 2,3,4, 5,and 6 as pertains to the operation of 
>> the equipment.  Was this the TM for the R-390?
>>
>> Victoreen  is well know for their sub-miniature HV vacuum tubes, 
>> extremely hi-resistance glass resistors, and their radiation detection 
>> equipment.  Now there appears a BALLAST with their name?  Could it be 
>> that this was short lived because  AMPERITE had the  patent rights or 
>> did VICTOREEN have it and then pass it over to AMPERITE?
>> The question to Mahlon is "What is the information that is printed on 
>> the box of these tubes?". Is there a Date Code on the Box? And if you 
>> have a DVM, what is the resistance in ohms across the element?
>>
>>  
>>
>> A HAPPY LABOR DAY TO ALL!
>>
>> 73,
>>
>> Glen Galati, KA7BOJ
>>
>> Tacoma, WA
>>
>>     -------------- Original message from Mahlon Haunschild : 
>> --------------
>>
>>      > Hello, list.
>>      >
>>      > At Shelby this weekend a tube-head in the flea market forced me to
>>      > purchase a pair of TJ311M01s from him for $5 the pair (yes, that's
>>      > right, $5). As most of us know, the TJ311M01 is essentially the
>>     same as
>>      > the 3TF7.
>>      >
>>      > Just wanted to note here that these particular examples were 
>> made by
>>      > Victoreen in 3/56, so it seems that there were other
>>     sources/production
>>      > lots made other than Amperite in 1978 (as one source has noted).
>>      >
>>      > Just so you know.
>>      >
>>      > regards,
>>      >
>>      > Mahlon - K4OQ
> 
> 
>