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



Way too expensive when you can get a new Yaesu FT-857 for $629




>From: Andrew Glasbrenner <glasbrenner@mindspring.com>
>Reply-To: Andrew Glasbrenner <glasbrenner@mindspring.com>
>To: William Leijenaar <pe1rah@yahoo.com>, amsat-bb@amsat.org
>Subject: Re: [amsat-bb] 2m to 70cm upconverter design, any interrest ??
>Date: Thu, 23 Jun 2005 16:26:35 -0400 (GMT-04:00)
>
>Hamtronics _used_ to make the XV4. It was something like 10mw in on 28 mhz, 
>1 watt out on 432 or 435. Sold as a kit for $90 about 5 years ago. I bet if 
>there was a group order, or enough demand, maybe they'd bring it back.
>
>The offer of the kit is admirable, but frankly at $250 assembled you could 
>find any number of used 432 all mode transceivers for similar cost. DEM has 
>a 10mw 432/435 transverter kit minus hardware and box for $180. Thats 
>transmit AND receive.
>
>73, Drew KO4MA
>
>-----Original Message-----
>From: William Leijenaar <pe1rah@yahoo.com>
>Sent: Jun 23, 2005 3:08 PM
>To: amsat-bb@AMSAT.Org
>Subject: [amsat-bb] 2m to 70cm upconverter design, any interrest ??
>
>Hi AMSATs,
>
>To get on the 70cm HAMSAT uplink is not easy for many
>hams in the world. FM handies are available, but other
>modes than FM is very rare and to expensive for those
>hams.
>
>To get them on 70cm ssb the best way is to use an
>upconverter from their widely available HF. With use
>of an upconverter an 10m ssb signal will be converted
>into an 70cm ssb signal and can be used for HAMSATs
>uplink.
>With use of a 2m to HF down-converter the same HF can
>be used for receiving the HAMSATs ssb downlink.
>
>I have been looking around the web to find available
>converters. For 2m to 10m down-converters there are
>several options, with good prices. Unfortunatly for
>10m to 70cm up-converters there is very little
>available and with high prices.
>
>Because of this I have been working on a cheap and
>simpel to make design. After some weeks testing and
>experimenting I got something on the test bench.
>
>The prototype can be seen on my webpage:
>www.qsl.net/pe1rah/10m70cm.htm
>
>or via my main page:
>www.qsl.net/pe1rah
>
>The features of the design are:
>-------------------------------
>* Made on a PCB
>* In a metal box (74mm x 148mm x 30mm)
>* 407MHz local oscillator build in
>* 12Vdc power supply
>* 50mW output on 70cm (enough to drive M57716 10W
>power module)
>* 28MHz BNC input, 70cm BNC output
>* Unwanted suppression >40dB
>* No exotic components
>
>When there is enough interrest I will deliver kits and
>complete constructed converters.
>
>I can not deliver it for a price less than below:
>-------------------------------------------------
>Kits              = 175 USD (+ shipping costs)
>Complete build    = 250 USD (+ shipping costs)
>
>!!! Please note that this is a complete TX
>upconverter, included PCB, Crystal, metal box, BNC
>connectors etc etc
>!!! The only thing needed to be qrv on HAMSAT 70cm
>uplink is a final amplifier.
>!!! Best solution is a M57716 module that give 10W
>output at the 50mW input.
>
>Let me know if there is any interrest,
>
>73,
>William Leijenaar
>PE1RAH
>---
>
>
>
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>----
>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!
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>----
>Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
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