[Elecraft] [K3] Heil 600 ohm balanced mic (PR40) connecting to rear

[Russ]

Yup
A little bit of common mode
Russ KD4JO



Sent from my T-Mobile 4G LTE Device


-------- Original message --------
From: Clay Autery <KY5G at montac.com>
Date: 6/7/18 5:16 PM (GMT-05:00)
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] [K3] Heil 600 ohm balanced mic (PR40) connecting to rear

And if for some reason you have a TRS available and not TS
connector....  just wire the ring and shield to Pins 1 and 3, and still
pin 2 to tip.

______________________
Clay Autery, KY5G
(318) 518-1389

On 06/07/18 13:59, Bob McGraw K4TAX wrote:
> If you wish to make your own cable using a XLR connector and a 1/8"
> Tip-Sleeve connector,   XLR pin #2 connect to Tip, XLR pin #3 and pin
> #1 to the Sleeve.   In the XLR world, pin #1 is ground/shield, pin #2
> is hot (+ve) and pin #3 is cold (-ve) Thus for unbalanced use, pin #1
> and pin #3 must be connected.
>
> Also, the mike bias must be OFF via the configuration selection in the
> radio.
>
> 73
>
> Bob, K4TAX
>
>
> On 6/7/2018 11:06 AM, Michael Blake wrote:
>> Mike,  I connect my EV-RE50ND to the rear 1/8” connector on my K3s
>> without issue.  You need an XLR to TS 1/8” male cable or adapter.
>> The mic does not care if it is balanced or unbalanced but if you use
>> an XLR to TRS adapter the ring will be floating free and will cause a
>> problem.
>>
>> You can buy the correct 3 pin XLR to 1/8” TS Male cable at your local
>> Guitar Center or similar place for less that $20….
>>
>> Select the rear mic. Gain high and bias off.  The very same mic and
>> cable also work perfectly with my KX3.
>> Michael Blake
>> k9jri at mac.com <mailto:k9jri at icloud.com>
>>
>>
>>
>>
>>
>>
>>> On Jun 7, 2018, at 11:56 AM, mike <ai6ii at comcast.net> wrote:
>>>
>>> I would like to connect my 600 ohm balanced mic PR 77D to the K3s
>>> rear mic
>>> connection. The mic connector is XLR 3-pin. I cannot figure out if
>>> the K3
>>> rear connection can accept a balance mic. The adapters I have tried
>>> produce
>>> hum and lead me to believe they force it to unbalance.
>>>
>>> Any help appreciated. 73  ..mike  AI6II

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