Hello, I was going to answer this post later but better do it now. I just upgraded 5 TKR-850's to the "New Improved" PA deck, I was using one on my 442.15 repeater when it blew (fried charcoal) the driver Q-4. Only one problem, they don't like to work as good as the old PA below 450 MHz. These new PA decks don't put out the rated power and are not as broad-banded as the old ones. At 450 and below the transistor gets very hot very fast telling me the transistor is having problems at that frequency. I have some high voltage 2 to 9 pF variable capacitors that I may try in strategic places on the final, bet they will make rated power then. That's the problem with the broadband devices, sometimes that aren't. One step forward, two (sometimes three) steps back.
I am not going to be using these repeaters below 450 MHz any longer but I want to see if I can make them work below 450 before I put them back on the commercial frequencies. Paul WB5IDM -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] Behalf Of Ken Arck Sent: Monday, April 18, 2005 3:43 PM To: [email protected] Subject: Re: [Repeater-Builder] Kenwood TKR-850 repeater questions At 04:14 PM 4/18/2005 -0400, you wrote: > >Those repeaters are rated for 25 W for continuous duty repeater service, >so it is making rated power. In any case, I wouldn't run it beyond what >your getting. <---Not true. TKR-850's should make at least 40 watts when programmed for high power. >> Question 3...The CW ID turns itself on every "X" minutes regardless >> of how I set it in the software...am I missing something? I don't >> want it to ID unless there is activity on the repeater. <---Can't be done using the internal controller. Commercial repeaters ID whethere they're active or not. >> Question 4...to float charge a battery, the service manual refers >> to "shorting the charge land near R61". Is this the 2 little traces >> on the board? Should I just solder a jumper across these 2 little >> pads? <---Yes, that's correct. >> Question 5...anyone have any experience using these units in the 440 >> MHz range? I plan to use it in the 460 MHz range, but I was curious.> >I know of one right now on the low end of 442 Mhz-runs just fine. <---We have many running in the ham bands. A slight retune and away you go! >> Question 6...I bought the repeater used so if I can't get the power >> up to the factory specs, would I be ok to turn the power down to say >> 5 watts or so and run an external amp or would I be better off >> putting in a 3 or 6 db pad between an external amp and the RF out >> from the repeater? I really want the repeater to work up to spec. <--I think you should look into why it won't make 40 watts when programmed for high power (assuming the usual suspects, such as SWR and a 'non-flakey' cable/connector/power meter isn't the culprit). Ken ---------------------------------------------------------------------------- -- President and CTO - Arcom Communications Makers of state-of-the-art repeater controllers and accessories. http://www.ah6le.net/arcom/index.html Come see us at Dayton 2005! We now offer complete Kenwood TKR repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net Yahoo! Groups Links Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
