well, thanks for the advice --on and off list...I unplugged the lead from the LLD to teh PA and tried to measure it on my meter....it moves, but barely...seems a very low level from the low level dri
Well, I am still not getting much power out of the omni...so far I have disconnected the input to the PA and measured direct out from the Low Level Driver (LLD)...almost nothing to measure even on th
well, I have replaced all diodes save the zenor, the small signal transistors have also been replaced with 2n3904's and I have bypassed the PA all together...have virtually no output--maybe something
The power supply is a 32 amp switching supply...meter on the amp is pretty steady at 13.8 but note my digital meter is a bit off...perhaps by a half volt or so. given that the LLD is now connected es
Actually, I really have next to no output when I bypass the PA...the two watts I get is when the PA is in line...possibly it is only getting 200mW and the PA is bringing it up to 2 watts (?)...Paul f
Well, the saga continues...in addition to the previous work I have replaced the diodes on the SWR board as well as the TX mixer board no diff. Present condition: PA bypassed from circuit altogether w
Thanks Mike...checked most of what you have listed already including the VFO Amp and I already replaced the 2n3866's :)... Time to look at the passive components on the LLD I think...it would be help
oh my,...I think I have exceeded my bandwidth usage on this one...but yes, there are some misunderstandings: Forget the PA...I don't even care if it works or not at this stage (pardon the pun)...I ne
I had the same problem with mine...I had to play with the final bias as it was not sufficient and going into class C I believe...As I recall the curent reading ended up being bit higher than called f
when I tuned up my Argosy a while ago I did it to spec...I kept getting complaints of distorted audio, however...it took me forever (as it often does) to find the bias was too low despite d=being wha
For those of you who have been helping along with the OMNI D low power issue, here is the update: I dragged out the fluke scopemeter tonight and did some checking...the amount of power going into the
Well Rick, you win the prize...you were correct...I could have saved myself some time had I checked this sooner, of course...I knew I was close when I injected a 0 dbm signal at the tx mixer output a
John I am up to my elbows on the bench right now, but when I get cleaned up I will look at my ARGOSY...seems I recall the little metal plate you mention...I did not have any issues and also had some
Author: Scott Sheppard <scottsheppard@videotron.ca>
Date: Sat, 18 Feb 2012 13:08:27 -0500
I too really had not thought too much about the Crystal filter--I even had it out last night...the receive has worked during all of this nonsense...I have a 1.8 and will play around for fun... scott
Author: Scott Sheppard <scottsheppard@videotron.ca>
Date: Sat, 18 Feb 2012 14:02:03 -0500
So the next stage of the problem would seem to be finding out why teh crystal is baving linke it is...here is the situation: 1. Normal filter left in place -great receive, no problem... -virtually no
I will....right now I am going to take the dog out and get some air! Even with the rig off, and both the xtal filter and TX mixer boards removed...the output pin on the tx mixer is common to ground--
Well done Gents!...tweaked the trimmer caps on the SSB Gen board and we are back in the game...many thanks...now I have lots of alignment to do as well as still doing all all the other things that we
Author: Scott Sheppard <scottsheppard@videotron.ca>
Date: Sat, 18 Feb 2012 18:47:55 -0500
Too much fun...its almost sad when it ends hi...sincerely appreciate the help. I may look at getting a simpler Osc scope...the fluke was nice and easy to use... i have a HP 1703 of my own--just have
John how goes the battle? I had a look at my rig and only have a couple machine screws holding the plate...perhaps yours is a bit different? I have a very early analog Argosy...send me a pic if you c