Comtek issue, rhythmic tapping or clicking sound

[MikeCorl]

This is actually a fix and not a question. I’ve been having issues with a M-216 transmitter sending out a consistent ticking sound. I tried everything to fix it and it ended up being the rechargeable battery that was causing the issue. Switching to an alkaline battery immediately fixed it. 
Related, if you have a brand of 9V that doesn’t give you an issue, I’m taking recommendations, haha! 

[Ty Ford]

We used to think that rechargeables had a somewhat floaty supply level and that caused problems with some circuitry, especially as the batteries age. I had a similar problem using rechargeable 9 VDC batteries in a home security system years ago. The transmitter would fail irregularly and trip the system. 

[Derek H]

iPower 9volts work well. 

[Neil Bliss]

I also use the iPower 9v's without any problems.

[Jim Rillie]

iPower 9volts have worked well for us for years when bagging it. The ticking may be caused by other things, like an LED dimmer, or cell phones too close in my experience,  anything that radiates RF, but your experience leads to battery.

 

[MikeCorl]

Thanks for the recommendations! I went by Trew in Nashville this morning and picked some up iPower 9v's and with the help of Zach was able to run tests on a set they had in stock to confirm it fixed the issue. 

 

If you are looking to avoid the issue, the ones I was using were the EBL Li-Ion 600mAh 9v model 6F22. They don't seem to cause any issues in the Rx, but is problematic in the Tx.