There is an interesting article by Jim regarding his thoughts for future development to handle fldigi, etc. http://james.ahlstrom.name/hamlib.html 73 ... Sid. ...
Hi Scott I spent some time looking at a schematic that I had for a 751 (not 751a) and could not find Diode 66. Downloaded the 751a schematic and I find D66...
Hello All, I have uploaded the information on modifying the Softrock Ensemble RXTX to increase the TX RF Output Power. This information is detailed in the...
Ed, I did not see a BS170 matching procedure. I think you should add an appendix that describes how to match the 4 BS170 transistors, for easy reference. There...
Hello. When I try to launch WSPR via "/WSPR $" (the build directory I presume), I am encountering the following error message: Traceback (most recent call...
hit the Tx button .... then look .... I guess the thought is .. if your not Tx'ing .. you dont need to set the balance .... To: softrock40@yahoogroups.com ...
Thanks Mike ..... I'll give that a try tonight ...... Guy|KB6VY From: softrock40@yahoogroups.com [mailto:softrock40@yahoogroups.com] On Behalf Of MIKE DURKIN ...
Heya Don, sorry took so long to get back. Â Yes that sounds correct. Â I tapped at D66. Scott ________________________________ From: wb6bee <haywooddc@...>...
Thanks to Alan and Fred for their helpful suggestions. In the end it was very simple. I used the driver listed in the Jan 10th posting by Fred PE0FKO which...
Hi Scott I spent some time looking at a schematic that I had for a 751 (not 751a) and could not find Diode 66. Downloaded the 751a schematic and I find D66...
John Even with an unmodified RXTX I have not been able to quantify an operational benefit from matching BS170s. In the case of Ed's modifications I suspect...
Try "make install", it puts a number of files in /usr/local/lib/python2.7/site-packages/WsprMod/, amongst them is a binary called w.so which is missing. 73 ......
In reading Ed's documents I note he does indeed call for four matched BS170. He has done extensive testing on this configuration and I would certainly defer to...
... Subject: [softrock40] Re: GM3SBC QRO Modifications ... Warren, There have been a few cases where one of the BS170s has had a greatly different Gate...
... Subject: [softrock40] QRP2000 USB controlled synth, win7pro... problem fixed ... Peter, Glad you got it working. I'm puzzled, up to now your "trick" has...
Hi Alan Yes I have seen a wide variance in Gate Threshold Voltage in the devices I have tested. I have not however been able to translate that into a...
Hi, do you have a circuit you used to key your relay? I ended up drawing too much current through Q3 and had to replace Q3. Before I try something else, I...
... Subject: [softrock40] Re: GM3SBC QRO Modifications ... I see Ed says 4 BS170s need to be matched but surely the one used as a bias source is also best...
It remains a controversial subject.... I have not seen any evidence of the need but I am sure willing to be proven wrong. One possible weakness with Ed's...
Hi Warren, Looks like an alternative could be to mount the 4 FET's on a separate larger heatsink with 3 short leads from each pair to the board to address the...
Sid It could be.... but Ed is clearly no amateur at this and it may not be a problem. I would be willing to try it. My 30/20/17 build puts out 2.6 watts in...
Sid Off my soapbox and responding directly to your suggestion: for the original design concept to work you need would need to tightly couple the 4 PAs and the...
Hi All, As requested, I have uploaded a file to the GM3SBC QRO Modifications folder in the files section. This file shows the test circuit used to match the...
Ed I think we have just agreed: matching cannot hurt.... it may help.... but if it does you probably won't notice the difference. Did I get it right? :-) ...
Thanks Warren, It's worth a try so I'll have a closer look at it. Out of 10 BS170's in the pack from RS Components only 3 matched closely within 0.01V and the...
... I have done badly mis-matched FETs in the basic design and I could find no measurable discrepancy between them and two closely matched ones. My curiosity...
