12-05-2014, 07:09 AM
All I was pointing out is that the Book is not to be trusted, and neither are/were Pye when it came to jiggery-pokery with the Circuits.
For example, according to the Book the VHF2DSG has Solid State Diodes for the am Detector and Discriminator, plus a Balance Control - R27/28. It does say 'Early Models.
The VHF3DRG uses an EABC80 and being Mono doesn't have a Balance Control.
The VHF3DSG Diagram is very similar to the VHF2DSG but doesn't have a Balance Control whereas the VHF3D actually does - it's not very visible or accessible, but it's there.
So, although none of the above actually affects connecting a Stereo Source it's as well to be aware that there are differences if you're trying to repair one.
Alan
For example, according to the Book the VHF2DSG has Solid State Diodes for the am Detector and Discriminator, plus a Balance Control - R27/28. It does say 'Early Models.
The VHF3DRG uses an EABC80 and being Mono doesn't have a Balance Control.
The VHF3DSG Diagram is very similar to the VHF2DSG but doesn't have a Balance Control whereas the VHF3D actually does - it's not very visible or accessible, but it's there.
So, although none of the above actually affects connecting a Stereo Source it's as well to be aware that there are differences if you're trying to repair one.
Alan
