[GreenKeys] 35 ASR current loop connections....

[John, W9DDD]

Pardon my stupidity.  Don't try to answer an email when you're doing 
something else.

John, W9DDD

On 4/25/2019 1:31 PM, John, W9DDD wrote:
> The paperwork is letter size and folded in half fits snugly in the 
> envelope.  It would be easy to miss if not looking for it.
> 
> I can't send you anything at the moment because I'm out the door for an 
> appointment.
> 
> John, W9DDD
> 
> On 4/25/2019 1:27 PM, John, W9DDD wrote:
>> See if any of this helps
>>
>> https://www.blunham.com/Misc/ASR35/
>>
>> John, W9DDD
>>
>> On 4/25/2019 1:03 AM, Clay Archer wrote:
>>> My rebuild of my 35 ASR is going well.   I have just about everything 
>>> working in local mode.   Reads and punches tape and types correctly, 
>>> and can type and punch from the keyboard.   The rubber on the 
>>> printing reperf print hammer is missing, if anyone has a source 
>>> please let me know (p/n 173979).   I also need the paper tape spool 
>>> holder,  I could probably make something to do the job.
>>>
>>> I’m ready to try it “on line”, but I need to work out the current 
>>> loop connections.    It had some cut wires connected to the lower 4 
>>> screw terminals on the back of the power supply section (I think the 
>>> book calls it the “electrical service unit”).  The upper 4 terminals 
>>> are numbered 1 to 4 and is where the power cord connects.    The 
>>> bottom 4 are numbered 5 to 8.   Terminal 8 has no connection.     On 
>>> my 33ASR I have looped the input & output with a current limited 
>>> voltage (a small 6 or 9 volt battery usually works) so I thought I 
>>> would give this a try on the 35.   Connecting a battery to terminal 5 
>>> & 7 or 6 & 7 will stop the chattering like it’s receiving a valid 
>>> loop.   And it sometimes prints random characters when I connect to 
>>> these terminals.    However, when I type in line mode the data goes 
>>> to the punch instead of the printer. The selector knob is set 
>>> correctly to the keyboard-to-print position and it works in local.    
>>> Using a scope I can’t see any pulses when I type on the keyboard on 
>>> any of the screw terminals (I applied a small voltage as a pull-up). 
>>>  I also found that if I jumper 5 & 7 or 6 & 7 (without a battery) it 
>>> acts the same way.
>>>
>>> There are also 8 screw terminals on the back of the call control 
>>> unit, none seem to do anything.    Oddly, my call control unit 
>>> consists of a transformer and a relay.   The relay never seems to 
>>> activate with any knob setting or line/local.
>>>
>>> Does anyone have any manuals on the 35 ASR?    All that I can find 
>>> online are for the KSR & RO.    The schematic for the KSR & RO shows 
>>> it’s quite different from the ASR.
>>>
>>> Any assistance you can provide would be appreciated.
>>>
>>> Clay
>>>
>>>
>>>
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> ______________________________________________________________
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> 
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