I don't know about the others but the biggest pain for me is checking the height of the ganged tuning slugs. They have to be set exactly per the manual and I think the difference between some of them is only about 1/32 inch. Had an old one where the tuning mechanism had slipped a little and I couldn't tell if the slugs were white or yellow. They looked somewhere in between. Tried the alignment using the white settings and it didn't work. Found out they were yellow after all. But it still never worked right on 10 meters. The trimmers were out of range and I couldn't neutralize the finals. It worked as expected up through 15 but on 10 things fell apart. Turned out to be the parasitic plate chokes. You wouldn't think it was important but something must have happened to those 2 watt resistors over time. They went up in value to about 62 to 68 Ohms. It didn't seem important but replacing both of the chokes fixed the 10 meter problem. It became apparent when I used a return loss bridge to check the final tuning circuit.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of George KB2Z Sent: Monday, January 26, 2004 12:48 PM To: [EMAIL PROTECTED] Subject: [drakelist] T-4x Alignment Hi Again All; Cleaning the switches appears to have corrected the intermittent tx problem, for now. Not sure if more cleaning will help the output on 20 and 40M? I was able to tune the rig on 80 thruogh 10M. The output is approx; 80M = 30W 40M = 140W 20M = 25W 15M = 100W 10M = 75W I want to try aligning it per the manual and wondered if there were any hidden land mines to watch out for. RF and mixer stages instructions 3 to 10 have you peak the inj with a sig gen. Steps 11 to 18 have you do the rf with the vfo. During steps 11 to 18 do you re-peak the inj with the rf in any particular order? Can I use the rx to peak the 160M band? I dont have a 160M tx xtal. The rx does have a 160 xtal. Does it matter if I dont peak the 160M band? Dont have an antenna for it anyway. I have not tried the rx & tx as a pair yet. Want to get the tx up to snuff first. I appreciate the help. Thanks in advance for any suggestions or advice, George KB2Z ---------------------------------------------------------------------- Submissions: [EMAIL PROTECTED] Subscribe: [EMAIL PROTECTED] - subscribe drakelist in body Unsubscribe: [EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost: [EMAIL PROTECTED] - help in body of message Brought to you courtesy of TLCHost.net http://www.tlchost.net/ ----------------------------------------------------------------------
