Page 1 of 1

Schematic/Parts list Difference

PostPosted: Fri Nov 06, 2015 1:00 pm
by opa1
On the Budgie, The schematic is showing R11,R12 @ 220K. The parts BOM is showing 475K R11,R12. Which one is correct?

Re: Schematic/Parts list Difference

PostPosted: Fri Nov 06, 2015 2:33 pm
by battradio
Well both will work , a cathode biased 6Bq5 El84 both values are stable , the 470K ohm will give lower bass extension with the specified coupling cap and is spec'd in the RCA tube manual.
http://frank.pocnet.net/sheets/191/6/6BN11.pdf

Re: Schematic/Parts list Difference

PostPosted: Fri Nov 06, 2015 2:39 pm
by opa1
Thanks! This is the load resistance @ 4500 ohms correct?

Re: Schematic/Parts list Difference

PostPosted: Fri Nov 06, 2015 2:46 pm
by battradio
look under max circuit value of first grid .47 meg ohm