UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Superstar 6900N V6

Bigpimp347 · 23rd May 2020, 9:57 am

Chances are if it's drawing current with no audio on SSB (or AM) try the 2SB688 voltage regulator hasn't gone dead short supplying 13.8v directly to the MOSFETs.

Common fault is 20W is too much for these radios due to their poor design, MOSFET finals and lack of cooling and heat dissipation for the regulator, sooner or later something gives.

23rd May 2020, 9:57 am	#57
Bigpimp347 Triode Join Date: May 2020 Location: Nottingham, Nottinghamshire, UK. Posts: 21	Re: Superstar 6900N V6 - Fault with SSB mode Chances are if it's drawing current with no audio on SSB (or AM) try the 2SB688 voltage regulator hasn't gone dead short supplying 13.8v directly to the MOSFETs. Common fault is 20W is too much for these radios due to their poor design, MOSFET finals and lack of cooling and heat dissipation for the regulator, sooner or later something gives.