Having an MD-200A8X, I rarely need to look at other audio sources. Combined with the majority of radio time these days being on digital modes, I have not had the need to buy additional kit, until now.

Like most of the planet, 2020 hasn't really gone to plan and I'm working from home and replacing endless video conferences and meetings in the office with Microsoft Teams and Amazon Chime calls. Quite frankly the audio on these calls is awful, with a mixture of cheap tinny mic's in laptops and the odd cheap, or sometimes expensive headset that doesn't really represent the voice of the person very well, and being USB isn't terribly useful for anything else. The additional fact that any reasonably priced headset has long gone and is on back order, I thought I'd have something I can use on the radio when I'm back in the office, instead of getting lost in a box somewhere.

I've not found a cable diagram for this cable so have put the following information together in the hope it helps someone else get their BPHS-1 on the air a bit quicker than I did.

Headset : Audio-Technica BPHS-1 Broadcast Headset

Mixer : Behringer Xeynx Q1002USB

Cables : Home brew - (Yaesu 8-pin) > (XLR) for Headset Direct and (Mixer) > (Attenuator) > (Yaesu) for Mixer into Radio.

 

The following cable is a alternative to the Heil CC1-XLR-Y8BAL cable, without the PTT in this case, but can be easily added. I've not seen one of these cables to comment on the build quality or anything within the wiring that may be better or worse ? This one works well though, and costs about £5 + your time.

Yaesu 8-pin to XLR

  • Neutrik XLR Female Connector
  • Yaesu 8-pin Connector
  • 2 core plus shield cable
  • Heat shrink (preferably not red, it's all I had in that size that was accessible)

Yaesu 8-pin end connections

Pin 8 - Signal +
Pin 7 - Signal -

Route shield to the plug casing by clamping the shield back through the connector. Test for continuity whilst mobilising the cable to ensure good contact.

PTT can be added by placing a switch, or two pole connector between pins 6 (ptt) and 5 (gnd). There have been reports that this can lead to RF breaking into the cable thus I didn't add this feature.

 

XLR end connections

Pin 1 - Shield that is connected to the 8-pin connector body.
Pin 2 - Signal +
Pin 3 - Signal -

Place wire between XLR connector ground and XLR pin 1.
Place capacitor between XLR Pin's, 2 and 3.

Test shield continuity between XLR Pin 1 and the 8-pin connector body.

Base of connector showing Shield to Connector ground (excuse the soldering on test connector, still works though)

 

Top of connector, showing capacitor and top of ground loop. (This soldering is even worse, still works though)

 

Behringer Mixer Output to Yaesu Rear connector (incorporating Line to Mic Level Attenuator - -40dB)

This cable is a 6.35mm mono cable from the mixer to the rear Phono mic connection into the FT-2000. This is expecting a mic level input, whereas the output of the mixer is Line level. A -40db attenuation is required, so a L-pad is created from 2 resistors to drop to a 10th of the originating signal. This should level the microphone input.

In this case, an already terminated cable was purchased, with a Neutrik barrel connector, which has plenty of room inside to hide away two resistors and a capacitor, with careful soldering and heat shrinking.

The final solution is an L-Pad with an 680 Ohm and 68K Ohm resistor, as follows ;

 

Joomla templates by a4joomla