In my twins I put 20.8 crystals in both units. Keeps it simple. The band just starts at 9.7 in both.
I would complain that there is a nasty birdy from the VFO at 10.103. I have not done the math, but I wonder if a different crystal frequency could move the birdy below 10.1. 73, Bob WW3QB --- On Sun, 11/8/09, Eric Webner <[email protected]> wrote: From: Eric Webner <[email protected]> Subject: Re: [Drakelist] using the Twins on the WARC bands To: [email protected], [email protected] Date: Sunday, November 8, 2009, 7:58 PM Garey, What, then, are the rules if one wants to crystal the receiver to run 30 meters, and use it for transceive operation? 73, Eric KA8FAN From: Garey Barrell <[email protected]> To: [email protected] Sent: Mon, September 14, 2009 12:40:37 PM Subject: Re: [Drakelist] using the Twins on the WARC bands Joey - You are absolutely correct. Any of the four line twins will work on all WARC bands, simply by adding crystals for each band. The only "odd-ball" is 30M, since it is so close to the PTO and IF frequencies in the transmitter a "non-intuitive" crystal frequency is required, (20.8 MHz). There is a small "forbidden" range right at 5-6 MHz and 10.5-12 MHz for the same reason, but there are no bands affected other than the oddball one at 5 MHz. These rules apply only to the transmitter. Any other frequency range from 1.5 to 30 MHz can be added simply by adding a crystal cut for 11.1 MHz above the bottom end of the desired range, i.e, a crystal at 24.6 Mhz would cover from 13.5 - 14.0 MHz. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs <www.k4oah.com> Richard J. Fiero II W5TFW wrote: > I am FAR from an expert, but what Geoff said about the twins isnt > Correct. I use mine on the WARC bands everyday. for about 40.00 > for each band You can also, even cheaper if you dont run split. > all it takes is a set of crystals and tuning the radios by the Manual for > the band you want to use. > 73 Joey > _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist -----Inline Attachment Follows----- _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
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