Interfacing a TK-880H-1 with a TKR-840

[WRQU355]

Wondering has anyone done something like this? I want to turn off the 5 watt transmitter in the TKR-840 and use the 40 watt transmitter of the TK-880H. I am think all it takes is inhibit TX of the repeater, use the COR signal from the repeater to key the TK-880H and receive audio from the repeater to the microphone line of the 880. Is my thinking correct? Any insights? 

[JohnE]

you will need TOR low>PTT , RX aud> Mic Hi and as long as the ground is common. That should work but not 100% on it , its been a long time since I did something like this.
COR will key anything it hears that breaks squelch. Might need a pot and cap to fine tune the TX audio level.
Also as a side note an 840 should do 20W-25 W unless it's turned down

Edited June 8, 2022 by JohnE

[WRQU355]

JohnE thank you for the info. According to my service manual TKR-840 is 100mw to 5w is it underrated or were you thinking the TKR-850?

[gortex2]

It would be cheaper to add a PA to the TKR to be honest and clean way to do it. I run 2 of them for SAR work and its solid as a rock. Especially a 50 watt PA. They are out there.

[JohnE]

was thinking tk 840 mobile. TKR 850/ 851 are 40/25

19 minutes ago, gortex2 said:

It would be cheaper to add a PA to the TKR to be honest and clean way to do it. I run 2 of them for SAR work and its solid as a rock. Especially a 50 watt PA. They are out there.

agreed. get a mobile amp 5>50 and be done w/it

 

Edited June 8, 2022 by JohnE

[WRQU355]

I had that thought also gentlemen, but I also have a box of the 880Hs. I may have to sell a couple off and get a TPL.

[gortex2]

You can find them on ebay all day long. The MSF PA is solid and works well for your application - "https://www.ebay.com/itm/154268645235?hash=item23eb20b773:g:no4AAOSw00Vf6~Sj"

 

[WRQU355]

gortex2 already on my watch list. Thank you.

[WRQU355]

Ended up getting a Motorola PA. Thanks guys for the advice.