Hi Skip, Ever think of writing a book.....so much to offer and helped me and many others, many times.
Thank you and Seasons Greetings to you and yours Sir...you are what Amateur Radio is about...(and the group). Doug - GM7SVK On 23/12/2009 7:06 PM, skipp025 wrote: > > Hello again, > > Doug reminded me of two other items... one is the must > have of one or two decent terminations (decent quality 50 > ohm dummy loads), decent quality coax jumpers and some > coax adapters (if required). > > Use of coax adapters is sometimes hard to avoid... but > using modest attenuator pads help reduce some adapter > issues. > > If you fish around Ebay, you can find really nice 3dB > Pads fairly cheap. Here's an example of what you might > want to use: > > Ebay Item Number: 200414154267 > > While the price of the above auction is in reality more > than fair (compared to the price of the item new)... you > can find the same or similar types of "pads" for less > money. You'd be trading time for money if you want to > pay less for this type of attenuator. I've seen and bought > many of them for less than $10 at flea markets. Just be > advised used ones can be el'smoke'd (burned up by excessive > power input). > > Same thing with Terminations (Dummy Loads) like the one > in the following Ebay Auction: > > Ebay Item Number: 170367584254 > > Great for bench work, cheap to buy if you're patient and > very usable for most of the typical Amateur Bands. > > Coax is another item that's fairly cheap to improve upon. > RG-214 mil-spec is usable but large and cumbersome in size. > A lot of us like and use the "Root-Beer" color Teflon Coax > types like RG-400. > > Here's another Ebay Example: > > Ebay Item Number 380188408647 > > > If you're not getting to crazy... even RG-223 coax works > at VHF frequencies without a lot of grief. > > another example with a picture > > Ebay Item Number 330309673164 > > And again, the price indicated in this auction is kind of > high to those of use who frequent Electronics/Ham Flea > Markets. I cite the above auction as an example with a > decent picture to look at. > > Other coax types can be used... but don't be cheap in this > area if you have the choice. In a pinch a few months back I > made up a very short RG-58 jumper to use on a back-to-back > UHF Maxtrac Repeater... only to find almost half the TX Power > was lost in the coax. T'was a Homer Simpson moment I'll > try not to repeat. > > cheers, > s. > > >> Doug Hutchison<specialq....@...> wrote: >> >> Low power HT, VSWR meter and dummy load will get there but not as >> perfect as the proper RF kit. It can be done as Skip suggests. >> >> Cheers and seasons greetings to all... >> >> Doug >> >> >> >> On 23/12/2009 18:20:18, Jim Cicirello (ka2...@...) wrote: >> > Hey Skip, for those of us who have a service monitor without a Spectrum >> > Analyzer built in, is there an alternative to using a radio with an S- >> > meter on the duplexer end to see the peak and notch? I was wondering >> if an >> > RF Meter would be sensitive enough to pick up the peak of the regular >> > output of a service monitor? Would this be better in that we are taking >> > another receiver out of the mix or would we be better to figure how >> to put >> > an analog S Meter on a scanner or some type of stable receiver? Also >> with >> > an variable output from say a service monitor, what do you use the >> > attenuator pads for and where. Thanks for sharing your knowledge and >> > experience. I only need to turn a few times a year and have an >> IFR1200A so >> > I have a stable output, I just need to see the peak and notch. >> > >> > 73 JIM KA2AJH >> > >> > From: [email protected] [mailto:Repeater- >> > [email protected]] On Behalf Of skipp025 >> > Sent: Wednesday, December 23, 2009 12:36 PM >> > To: [email protected] >> > Subject: [Repeater-Builder] Re: Can we tuning duplexer with this >> > equipment? >> > >> > >> > >> > >> > If you have a decent radio with some type of receive signal >> > strength indicator, some coax cables a separate transmitter >> >> > > > > ------------------------------------ > > > > Yahoo! Groups Links > > > > >
