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Title: VALIANT WITH NO OUTPUT ON 20,15,10 Post by: KB5MD on December 05, 2012, 12:33:26 AM My Valiant has full output on 160-40 but absolutely nothing on 20-10. I know there is a world of info on this site concerning Valiants but I can't seem to find anything about this problem. Has anyone else had this problem ??? The plate current and grid current is there, just no output.
Title: Re: VALIANT WITH NO OUTPUT ON 20,15,10 Post by: Pete, WA2CWA on December 05, 2012, 03:39:05 AM Do you have grid current, buffer current, plate current? Did you check the band to band VFO switching underneath the chassis? If that's not aligned properly, if can screw up various band operations. Did it ever work?
Quote Has anyone else had this problem.....(my computer won't make a question mark) Blowing compressed air into defective areas of the keyboard can clean out any crud. You could also use an emoticon ??? Title: Re: VALIANT WITH NO OUTPUT ON 20,15,10 Post by: N8ETQ on December 05, 2012, 08:51:10 AM The 5763 Buffer/Mult. may have issues. Thats V4 /Dan Title: Re: VALIANT WITH NO OUTPUT ON 20,15,10 Post by: KM1H on December 06, 2012, 08:25:25 AM Listen for the fundamental and harmonics on a receiver. If nothing its in the VFO, otherwise circuits that follow.
Carl Title: Re: VALIANT WITH NO OUTPUT ON 20,15,10 Post by: ke7trp on December 06, 2012, 01:18:03 PM I am going to also suggest the Rotator under the chassis. Its probably slipped on its shaft or the pin is not kicking it over.
Word of caution.. Dont ever lay the valiant upside down without extreme care. If you pull the front panel away from the chassis, the VFO coupler will break. If it does, You have a mountain of work ahead of you to get to it for a fix.. I set the valiant on its side. Heavy transformer down. Never on its back. C Title: Re: VALIANT WITH NO OUTPUT ON 20,15,10 Post by: W9GT on December 06, 2012, 03:41:29 PM Same thing is true with the Ranger. If that switch cam under the chassis is out of place or reversed it won't work on all bands. Been there done that.
73, Jack, W9GT Title: Re: VALIANT WITH NO OUTPUT ON 20,15,10 Post by: N8ETQ on December 07, 2012, 02:26:16 PM He said it worked on 40... /Dan As an FYI: a Valiant will triple the 160M VFO signal to 40. I have one on the bench now with all that "Linkage" loosened up because it is FUBAR. Switching the VFO by hand to 160/80 and setting the Band Switch to 40 yields plenty of Ig. Still audible in the bench RX but of course the dial on the Valiant is all outta whack. |