[Boatanchors] Ranger 1 chirp

[wb9tow at egr.msu.edu]

Ok, here is one for the books...
Johnson Ranger 1, chirps on 40m when out of the cabnet
when inside, only a very "slight" frequency "chirp" is
heard....most noticably when listening to 20m, while
transmitting on 40m...

Here is the background:
had the problem for 5 years, just appeared once...never went away!

Replaced:
ALL tubes
R3 (18K)
installed 150 v zener to replace OA2
replaced the following caps: C10, C12, C22, C29, C35,
C32, C39A C39B, C38 A & B, C90 A & B, C 89, C77, C78, C42,C43,C44,C45


L8 and L9

This rig work FB on 160m, 80m, 20m, 15m, & 10m!
Absolutely NO chirp on any band other then 40m...
NOTE:
ON 40M, THE EXCITER TUNING IS ON 75 RATHER THAN 43 AS
STATED IN THE MANUAL!
ALL OTHER TUNING (EXCITER & FINAL) IS CORRECT FOR OTHER BANDS

All currents for each stage is correct.
If plate cap is removed from the 6146, the chirp is not
noticable...

Any thoughts?
73 steve

All screws and tight in VFO,

Steve Marquie
A.R.S. W8TOW
Lab Instructor-TSM Program / Field Op Mgr-EnviroWx
Department of Biosystems & Ag Engineering
Room 126 Farrall Hall
Michigan State University
East Lansing, MI 48824
(517) 355-8128 office
(517) 2814122 Cell