[ARC5] [ARC-5radio] I-84B Receiver Test Set

[Mike Hanz]

Oh, I agree, Robert.  I have a CD-706 test adapter  but discovered early 
on that the adapter scratches the edges of any receiver plugged into it, 
so I made up the cable that you describe without the sheet metal "clip" 
that guides the connector into the socket on the rear of the receiver.  
I simply machined a small aluminum cylinder to mount the connector in, 
but you could also pot it in epoxy as well.  The problem is that not 
everyone has a spare rack connector to sacrifice to this duty.  Notes 2 
and 6 at the bottom of the GRM-1 cable image at 
http://aafradio.org/docs/Command_Set_Test.html talk about a couple of 
alternatives, the first of which uses a PL-152 to PL-152 cable -  but as 
Terry notes does not permit measurement of screen voltage or dynamotor 
B+ without providing those to the I-84-B separately.

On 10/27/2011 10:13 PM, WA5CAB at cs.com wrote:
> Personally, I think that I would make up the cable as shown, but 
> without all of the metal hardware around it.  In other words, an 
> 8-conductor cable with a PL-152 or 152-A on one end and an 8-pin plug 
> to mate with the connector on the rear of the receiver on the other.  
> Assembly time the same as that to make up a dual PL-152-(*) cable.  If 
> you use a modified rack, you can't get at anything much on the bottom 
> of the receiver.
>
> In a message dated 10/27/2011 19:07:47 PM Central Daylight Time, 
> aaf-radio-1 at aafradio.org writes:
>> On 10/27/2011 12:39 AM, T. Comstock wrote:
>> >I would have liked to connect the test set to the rack and not have 
>> to build a custom connector for the back of the radio, but I see that 
>> data will be lost for a couple of switch positions.
>>
>> Yeh, unfortunately that is true.  You will lose screen voltage and
>> dynamotor B+ output measurements unless you are able to tap into pins 5
>> and 7 on the rear of the receiver.
>>
>> It's a bit kludgey, but you can connect a pair of wires to pins 5 and 7
>> of the rack receiver connector (unused) and lead them out through one of
>> the rear phone plug openings to a two pin connector.  Then make a "Y"
>> cable that has a PL-152 on each end to plug into the I-84-B and one of
>> the PL-152 mating connectors on top of the the racks.  You will have to
>> redirect cable wires to the *rack* connector from I-84-B pins 5 and 8 to
>> the new connector.  Labeling of each PL-152 will be important for future
>> use! :-)
>>
>> Anyway, that's one way that is reversible to get full functionality from
>> the test meter(s) when using a receiver rack.
>>
>> 73,
>> Mike
>