Bottlehead Forum

Bottlehead Kits => Legacy Kit Products => Foreplay III => Topic started by: Nutube on February 01, 2013, 02:47:37 AM

Title: ext. fp3 resistors
Post by: Nutube on February 01, 2013, 02:47:37 AM

1.what does the 1k resistors connecting to the output centerpin  rca function
2. is there a reason why the grid resistor is further away frm the tube pin?
if i recall previous bottlehead buildts there was a mention.to keep it close to tube pin
.....just wondered

Title: Re: ext. fp3 resistors
Post by: Grainger49 on February 01, 2013, 03:09:13 AM

I think that the 1k resistor is to help if there is an impedance interaction between the two devices wired to the outputs.

I don't have the extended manual, but in the stock manual, page 33 the 220 ohm CC resistors are soldered as close to the tube socket as possible.  At the bottom of the page you can see that the destination grid from the first triode's plate has the resistor right up against it.  The manual may have been updated and the pictures not where I am calling them out.

Title: Re: ext. fp3 resistors
Post by: Nutube on February 02, 2013, 02:12:00 AM

ah thanks for the feedback