"VE3AX" <[EMAIL PROTECTED]> made an utterence to the drakelist gang ---------------------------------------------------------------------- For those interested in learning about frequency stabilization for L/C VFO's, here's an interesting link I found. I wasn't aware this is 15-20 year old technology. I suspect Conny DL1SDQ's DAFC for the TR7 works along one of these ideas.
http://www.hanssummers.com/radio/huffpuff/contents.htm What I like about this is the ability to avoid the external digital VFO idea like the DDS-2A for the S-line or the new Italian-made DDS-4 for the Drake 4-line. While impressive pieces indeed, I prefer to use the stock internal VFO's in these rigs. I acknowledge that those seeking computer control of their Drakes should love the Woodbox Radio DDS-4. http://www.cqdx.it/woodbox/DDS4.html 73 Peter VE3AX ----- Original Message ----- From: "doc" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, July 02, 2004 10:12 AM Subject: Re: [drakelist] TR7 drift > > doc <[EMAIL PROTECTED]> made an utterence to the drakelist gang > ---------------------------------------------------------------------- > If the $20. TCXO I mentioned would work, and I correctly understand > $C 150 to be close to $150. in USD what is the advantage of the > more costly alternative, please? > > I was unable to figure out the German site as easily as you! ;-) > > 73, doc kd4e > > VE3AX wrote: > > "VE3AX" <[EMAIL PROTECTED]> made an utterence to the drakelist gang > > ---------------------------------------------------------------------- > > Hi all: > > > > While we're on the subject of TR7 VFO drift, has anyone tried out Conny, > > DL1SDQ,s, PLL board for the TR7? He put one on the Bay a while back but > > sells directly as well. I exchanged e-mails with him and have checked out > > his web site, but before shelling out $C 150 for each board (incl. shipping) > > , I'd love to talk to someone who has installed one first. It appears to > > tune in (at installation) selectable 2, 4 or 8 hz steps, and is tuned by the > > existing PTO (???). Takes 5 wires to install and mounts underneath the > > motherboard. > > > > I don't find the drift objectionable after the radio has been on for a while > > and I have left the PTO dial lights in place. They just look too good with > > the new blue filters! I have found that by using the external RV-7 as the > > main tuning control, drift is significantly less a problem. Or you can use > > the RV-75 if you are lucky enough to have one. Incidentally, Conny tells me > > that you can also install one of his boards in the RV-7. > > > > Conny's web site is at http://www.conny-dl1sdq.de/1312.html > > > > It is in German but you can figure out just about everything you need to > > know without knowing the language. The pictures tell a lot. He has some > > other neat ideas for the TR7 as well. I particularly like the 10 turn pots > > for replacing the frequency control/voltage control pots on the power supply > > board. Far less likely to get "bumped" and easier to put right on > > frequency/voltage. > > > > 73 > > > > Peter > > VE3AX > > ---------------------------------------------------------------------- > On Behalf of doc <[EMAIL PROTECTED]> > Submissions: [EMAIL PROTECTED] > Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body > Hopelessly Lost: [EMAIL PROTECTED] - help in body of message > Zerobeat Web Page: http://www.zerobeat.net > Brought to you courtesy of TLCHost.net http://www.tlchost.net/ > ---------------------------------------------------------------------- ---------------------------------------------------------------------- On Behalf of "VE3AX" <[EMAIL PROTECTED]> Submissions: [EMAIL PROTECTED] Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ ----------------------------------------------------------------------
