[MRCA] GRC-106 Remote at Gilbert?

[KA1LHZ]

I think the dynamic input is for use with the RTTY modems.

DE KA1LHZ


On 09/02/2016 02:43 PM, Tom B wrote:
>
> So, how is a dynamic mic used with the GRC-106?
>
> Here is the confusing part from the manual:
>
> "1-14. TRANSMIT SECTION CIRCUIT ANALYSIS. (CONT)
> A. Audio Amplification.
> _The audio intelligence is applied to either pin 17 or pin 16 of
> connector J1. Pin 17 is the input for__
> __carbon microphones, and pin 16 is the input for dynamic microphones.
> _Resistor A2R1 is used to
> connect the required dc bias to the carbon microphones. Capacitor A2C1
> is used to block the
> microphone bias from being applied to transmit audio attenuator A2Q1.
> Resistors A2R2 and A2R5
> provide a voltage divider to reduce the higher input levels from the
> carbon microphones to one
> near that of the dynamic microphones. Resistor A2R5 also provides the
> 50-ohm termination for
> the carbon microphones. Resistor A2R4 provides the 600-ohm termination
> for the dynamic microphones."
>
> Tom
>
>
>
> On 9/2/2016 2:21 PM, Ray Fantini wrote:
>> The AN/GRA-6 is the correct system for the AN/GRC-106. It uses the older style H-33 handsets just like the 106 and appears in the manual as the proper remote for that radio. Newer style remote systems like the AN/GRA-39 will not work with the 106 being it's the wrong style of connectors to mate with the radio.
>> I just got a complete AN/GRA-6 kit and am in the process of trying to round up the two H-33 handsets and the weird BA-414 battery that you need to get them to work with the hope of using it with my self-propelled GRC-106 that I will have at Gilbert, the battery provides the high DC voltage that's used to work the relays in the C-434 local control unit at the radio although the battery lives in the C-433 remote. The whole mess is a lot like the old DC remote control systems that were employed in the Motorola and GE DC remotes of the fifties and sixties. The BA-414 is a 45 volt battery and I think I can cobble one together using five nine volt batteries.
>>
>> Ray F/KA3EKH
>>
>> -----Original Message-----
>> From: MRCA [mailto:mrca-bounces at mailman.qth.net] On Behalf Of Tom B
>> Sent: Friday, September 02, 2016 1:44 PM
>> To: B. Smith <smithab11 at comcast.net>; mrca at mailman.qth.net
>> Subject: Re: [MRCA] GRC-106 Remote at Gilbert?
>>
>> HI Breck,
>>
>> The GRA-6 is correct, but the manual for the GRS-39 says it should work, but I have not figured how to make it work, but there is a line in the
>> GRC-106 manual for a dynamic mic input.
>>
>> Anybody got any clues on what/how the dynamic mic input is used for in the GRC-106?
>>
>> Tom
>>
>>
>> On 9/2/2016 12:27 PM, B. Smith wrote:
>>>    Q. Which remote series was used with the GRC-106?
>>>
>>>
>>> Z
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