[NSRCA-discussion] Kraft info

[Ed Alt]

Yes, I remember that design.  It made for cheaper replacement servos and you could reverse the direction by changing the wiring.  Not the greatest design from a noise standpoint though.  Hanging your feedback pot off a bunch of extension wire does not lend itself to the smoothest servo operation.
 
Ed



Date: Mon, 4 Aug 2008 17:08:08 -0700From: bob at toprudder.comTo: nsrca-discussion at lists.nsrca.orgSubject: Re: [NSRCA-discussion] Kraft info




IIRC, Hobby Lobby sold a radio that was actually made by EK Logictrol. The servo amp was not in the servo, it was in the receiver (it was a big receiver). I think the servo direction could be changed by rewiring the connector or by reversing the connector - can't remember for sure. Anyone remember that? This would have been in the early 70s.Bob R
--- On Mon, 8/4/08, Wayne Galligan <wgalligan at att.net> wrote:
Yeah me too.. Bonner right?  but I was about 2 years old...   ;-)

Wayne Galligan


----- Original Message ----- 
From: "Ron Van Putte" <vanputte at cox.net>
To: <bob at toprudder.com>; "General pattern discussion" 
<nsrca-discussion at lists.nsrca.org>
Sent: Monday, August 04, 2008 11:35 AM
Subject: Re: [NSRCA-discussion] Kraft info


> Yeah, I can remember 6-wire servos.
>
> Ron VP
>
> On Aug 4, 2008, at 7:42 AM, Bob Richards wrote:
>
>> Jerry,
>>
>> Channel 04? That is a ham frequency, is it not? If so, then you  will 
>> need more than a crystal change to put it in the 72MHz band.
>>
>> The 4 pin connectors are Multicons. As long as the servos only have  3

>> wires, then you could probably get them to work with modern stuff 
(just 
>> make sure the logic level is compatible). I agree, is  probably better
to 
>> splice in new connectors. And servos that old, I  would at least send 
>> them in for service. The lubricant in the  feedback pots could have
dried 
>> out, and the wiring could have  become brittle. Personally, I would
lean 
>> towards installing new  servos, at least on elevator and ailerons.
>>
>> (And, yes, I am old enough to remember 4 wire servos. But I am NOT  as

>> old as RVP). :-)
>>
>> Bob R.
>>
>>

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