[Date Prev][Date Next][Thread Prev][Thread Next] - [Date Index][Thread Index][Author Index]

Re: Re: 2m to 70cm upconverter design, any interrest ??



Just purchased a JAN crystal for 98 Mhz.
Cost was $25.00 plus $5.00 shipping.

-------------- Original message from "Ed Krome (K9EK)" <K9EK@compuserve.com>: -------------- 


> Message text written by Andy Brian 
> > 
> Hi, 
> I know about that converter which was published in QST, the author was 
> KA9LNV. 
> The main problem for many of homebrewer were the local oscillator or better 
> the 
> crystal 101.875MHz, the problem was to get them somewhere. 
> Maybe any suggestion to take any similar crystal? 
> 
> best regards Andy< 
> ------------------- 
> 
> Hi, all: 
> I bought the original crystals from JAN Crystals in Florida. They 
> were rather pricey even at the time (~$22, as I recall). I just looked on 
> their 
> web site and it is a bit difficult to determine if they will even do single 
> crystals 
> any more. Down East used to carry them, but they aren't listed any more. 
> I have long thought that there must be some way to use standard 
> microprocessor crystals or oscillator modules in this sort of service. 
> Unfortunately, 100 MHz is just not close enough to 101.875 to work with 
> a standard 30MHz top end IF rig. And you just can't pull them that far. 
> Good 
> project for some RF guru. 
> As note on alternate thinking, one of the HF radios I have used 
> with transverters 
> is a Kenwood TS-430S transceiver. Nice in that it has a transverter port. 
> Plug 
> something into that 5-pin DIN and it automaticallly disables the 
> transmitter 
> and supplies 5mW of Rf through the transverter port only. Now here's the 
> cool thing... although the transmitter will not transmit out of band under 
> normal 
> usage, it will give you 5mW of RF out the transverter port on any 
> frequency. 
> Anywhere from 3 to 30 MHz. So, I crystaled transverters to be used on 70cm 
> so that the top end of the satellite band (436) would be at 30 MHz, and I 
> could 
> still use the weak signal portion (432) by simply tuning the TS430S to 
> transmit 
> on 26 MHz. Worked fine. I wonder how many other microprocessor-based 
> rigs will do the same? Now if I could only train the darn thing to transmit 
> above 30 mHz, I could use 100 MHz microprocessor stuff! Too bad. 
> Re: the 2-part 70cm article that Dom I8CVS (who actually built and 
> used one!) and others have referred to... I can send a 3-part zipped .pdf 
> of it, 
> where each part is small enough that most email servers don't choke on it. 
> 
> 73, 
> Ed K9EK 9ex-KA9LNV) 
> EM69xd 
> ---- 
> Sent via amsat-bb@amsat.org. Opinions expressed are those of the author. 
> Not an AMSAT member? Join now to support the amateur satellite program! 
> To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org 
----
Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org



AMSAT Top AMSAT Home