Thank you Eric, That is very helpful, That is why I am asking all these questions. ;-) I have not programmed anything yet as I am waiting for the lead to arrive anyway. I have now got the service manuals for both the TKR-750 and the TKR-850 and I will be following the instructions before doing anything. The TKR-750 should be no problem but the TKR-850 will be a bit of a job as it covers 400 to 430 MHz while I need it to cover 430 to 440 MHz here in UK and when installed in Malta. The controller will be an RC210 and the cavities for both are on the way.
If you have any other info please send it on as I am learning a lot about these beautiful Kenwood repeaters. Regards ___________________________________________________________________________ William A. Batey ([EMAIL PROTECTED]) G0DEO / 9H1IA / 9H1BBS ___________________________________________________________________________ The information contained in this e-mail is intended only for the person or entity to which it is addressed and may contain confidential and / or privileged material. If you are not the intended recipient of this e-mail, the use of this information or any disclosure, copying or distribution is prohibited and may be unlawful. If you received this in error, please contact the sender and delete the material from any computer. ___________________________________________________________________________ ----- Original Message ----- From: "Eric Lemmon" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Sunday, October 31, 2004 6:20 PM Subject: Re: [Repeater-Builder] TKR-750 & 850 Power Question > > Bill, > > The TKR-750 is factory-set for 50W on high power and 25W on low power. > There is one pot to set the power level, and the control microprocessor > simply adjusts the gain of the feedback loop to select high or low > power. The final PA is a 2SK3478 MOSFET transistor which, like most > PAs, gets very unstable when driven below specified levels. > > The above information came from the TKR-750 Service Manual B51-8556-10. > I don't have my TKR-850 Service manual handy, but I believe that the > high and low power levels are achieved in a similar manner. > > Be aware that the helical resonators in the receiver's front end must be > adjusted for your operating frequency, before placing the repeater in > service. There are also soldered jumpers to install when you have the > covers removed, for fan control and battery backup options. You really > should have the Service Manual in hand before attempting any adjustments > or option selection. > > 73, Eric Lemmon WB6FLY > > > > valleyforge2002 wrote: > > > > Hi all, thanks for the help given so far. This is starting to become > > very interesting. > > When setting up the repeaters the power in the software (KPG-66D) is > > either "High" or "Low", anyone know what are the actual levels that > > this defaults to when uploaded to the TKR's ? > > > > I have a VHF and UHF (Brand New) TKR-750 & 850 just waiting to be > > programmed once I get the lead which has been ordered so I am setting > > up the files making them ready for upload. > > > > Regards > > Bill G0DEO / 9H1IA > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.786 / Virus Database: 532 - Release Date: 29/10/2004 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/
