[Boatanchors] TS-505 D/U

[Richard Knoppow]

    FWIW, I found the NE-32 Neon regulator. Its rated at 85 Volts DC 
breakdown, series resistance 4800 ohms. The 5651 is rated at 86 volts 
with current of 1.5 mA to 3.5 mA, so it would appear that the 5651 can 
be used in place of the NE-32 for function but would have to have a 
different socket.
    For the NE-32 see:
<http://www.philbrickarchive.org/jlrmsousa/signalite_glow_lamps.pdf>

On 6/17/2024 12:40 PM, Richard Knoppow wrote:
>    The 5651 is a voltage reference tube. Forgot its voltage but its used 
> in various voltage regulated supplies to provide a very stable reference 
> source. You will find a data sheet at:
> <https://frank.pocnet.net/sheets/127/5/5651.pdf
> 
> For the TS-505D/U see:
> <http://www.bunkerofdoom.com/lit/ts505/ts505d.html>
> 
> 
> Preliminary handbook at:
> <https://radionerds.com/images/2/20/TS-505_Manufacturer_Instruction_Book.pdf>
> 
>     This has a reference to a later handook:
> <https://www.radionerds.com/images/c/c6/TM-11-5511.pdf>
> 
>      Can't tell you anything specific, I don't think I ever saw one.
>      The version in the handbook linked above has two neon lamp 
> regulators, perhaps replaced by the 5651 tubes in yours.
> 
>     As nearly always start trouble shooting with the power supply.
> 
> 
> On 6/17/2024 11:30 AM, Doug Hensley wrote:
>> Opening up a clean TS-505 D/U vtvm.  Anyone have any experience with 
>> these?  My meter powers up, all 4 fuses are good.  Meter shows an 
>> attempt to fluxuate.  But no zeroing or other life.  Has two 5651WA 
>> tubes which may be military version of OA3 (??).
>>
>> Any memories anyone ?
>>
>> TIA,  Doug
>>
> 

-- 
Richard Knoppow
Los Angeles
WB6KBL
SKCC 19998