[TenTec] Orion 565 tuning encoder

[Mike Schatzberg]

An old encoder repair technique is to spin the encoder at a medium speed using a reversible drill with a hand chuck. 

You need not disassemble anything other than remove the knob from the encoder shaft. 

Using some finesse,  carefully attach the hand chuck and rotate the encoder on one direction for about 30 seconds. Reverse the direction of rotation and rotate again for 30 seconds. Then repeat the cycle once again. 

This technique will help in clarifier applications where the encoder is causing rapid frequency excursions and erratic tuning as well. 

The complications of disassembly can sometimes be avoided this way. 

Simple, fast, easy to try. 

73,

Mike
W2AJI 

Sent from my iPhone

> On Jun 21, 2014, at 6:41 PM, "Bob McGraw - K4TAX" <RMcGraw at Blomand.net> wrote:
> 
> Shouldn't the two outputs be 90 degrees quadrature?  "A" leads "B" in one direction and "B leads "A" in the opposite?  I seem to think so.  I had to replace the MULTI encoder in my Eagle and I seem to recall it worked this way.
> 
> I actually opened the original one, cleaned it, put it back together and it works. I don't advise this however, unless you have a lot of spare time with nothing to do, good illumination and steady hands under good magnification.
> 
> 73
> Bob, K4TAX
> 
> 
> ----- Original Message ----- From: "Barry N1EU" <barry.n1eu at gmail.com>
> To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com>
> Sent: Saturday, June 21, 2014 1:59 PM
> Subject: Re: [TenTec] Orion 565 tuning encoder
> 
> 
>> After hooking up a scope, I think the encoder is bad.  I'm seeing negative
>> going pulses on the A pin but not seeing positive going pulses on the B pin.
>> 
>> Barry N1EU
>> 
>> 
>>> On Sat, Jun 21, 2014 at 6:41 PM, Barry N1EU <barry.n1eu at gmail.com> wrote:
>>> 
>>> I measure 4.9V on the A9 board.  I flipped the rig over and now I'm
>>> measuring 4.3V on the encoders (?!).  Not sure what's going on.  vfoA
>>> encoder is still working fine.
>>> 
>>> Barry N1EU
>>> 
>>> 
>>>> On Sat, Jun 21, 2014 at 6:34 PM, Barry N1EU <barry.n1eu at gmail.com> wrote:
>>>> 
>>>> I measure 4.63V on both tuning encoders.  And both encoders work on the A
>>>> cable, so it doesn't seem like that would explain it.  But I'll poke around
>>>> the A9 board.  I replaced all the A9 capacitors a few months ago.
>>>> 
>>>> Thanks & 73,
>>>> Barry N1EU
>>>> 
>>>> 
>>>>> On Sat, Jun 21, 2014 at 5:23 PM, shristov <shristov at ptt.rs> wrote:
>>>>> 
>>>>> 
>>>>> Barry N1EU <barry.n1eu at gmail.com> wrote:
>>>>> 
>>>>> > Thanks Sinisa.  vfoB would not tune at all.
>>>>> 
>>>>> I had the same problem.  VFO B encoder had a supply voltage of only 4.66
>>>>> V.
>>>>> After tightening 4 fixing screws on the A9 board, the voltage at encoder
>>>>> rose to 4.77 V
>>>>> and it started workig.
>>>>> 
>>>>> 73,
>>>>> 
>>>>> Sinisa
>>>>> _______________________________________________
>>>>> TenTec mailing list
>>>>> TenTec at contesting.com
>>>>> http://lists.contesting.com/mailman/listinfo/tentec
>>>>> 
>>>> 
>>>> 
>>> 
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> 
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