Home |
Search |
Today's Posts |
#2
![]() |
|||
|
|||
![]()
Andrew Holme wrote:
My PR155 has 50 Hz phase modulation sidebands on the interpolating VFO, when operating from AC mains. It's clean running from external DC, but the sidebands return if the mains transformer primary is energised with the secondary open-circuited. Could it be the magnetic field? Has anyone else noticed this? Bad supply caps leaving residual 50 Hz on the VFO supply lines. Get out a meter and I bet you'll see AC noise there. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
FS: Service manual Plessey PR2250 | Swap | |||
FS: Service manual Plessey PR2250 | Shortwave | |||
FS: Service manual Plessey PR2250 | Equipment | |||
FS: Service manual Plessey PR2250 | Equipment | |||
Help on Plessey PR 1551? | Boatanchors |