Author: "Jim M. via TenTec" <tentec@contesting.com>
Date: Thu, 12 Nov 2015 21:51:24 +0000 (UTC)
I suspect this has already been hashed over in the past, but I need some guidance. I use the TCXO calbration procedure found on the wiki, i.e. use SubRx, tune to WWV, adjust TCXO for same tone on US
I am not an expert on this, by any means, but I have set up a few TT. NOT Orions, however, but I find similar results as you. I will now ramble. First did you check Bfo frequencies for USB and LSB(if
Jim: The only accurate way to calibrate is to use the main VFO and WWV, preferably 15 or 20 MHz. Follow the directions for tuning the master oscillator found on my website: http://n6ie.com/TXCO%20Cal
Author: N4BE_Jim--- via TenTec <tentec@contesting.com>
Date: Thu, 12 Nov 2015 22:42:03 -0500
Hi Ron, I thought I was following your procedure but it's still off at each end of the HF spectrum. I know it's probably within the advertised specs but it just seems excessive. Below are the O2 freq
Jim: I can tell you for certain that it's not in the Orion product line since mine generally stays within +- 5 Hz from the broadcast band to 10 meters. In the old days when there were two separate os
Author: Gary J FollettDukes HiFi <dukeshifi@comcast.net>
Date: Thu, 12 Nov 2015 22:51:14 -0600
I am first suspicious regarding the use of either an Icom 775 or an HP 8640B as a calibrated reference down to 100 Hz. I have an 8640B myself and recognize that, despite its excellent design, it DOES
Gary: I believe your assessment is correct, especially in the later firmware versions that set up the 'cancellation' routine. This also fixed the slight difference in frequency between the main and s
Ron, I used your procedure and work FB. I used a Tone Indicator App on the iPhone to help zero beat. Also have done all my Jupiters and very happy with the result. Thanks for having the info handy. F
Author: "Jim M. via TenTec" <tentec@contesting.com>
Date: Fri, 13 Nov 2015 16:48:06 +0000 (UTC)
Well, who would have thought? I did a master reset and ram clear, then recalibrated to 10 Mhz wwv as described in the procedures. Now tuned frequencies appear to be exact on other bands/frequencies
Excellent! I'm glad it worked out for you! It was good to review the procedure since I haven't looked at it in years. It may inspire others on the reflector to calibrate their radios to high standard
On 20 year old rigs, if you have crystal based filters, they will drift over time in a process called crystal aging. The amount may vary depending on the temperature extremes experienced by the rig o