Foreplay 2 and anticipation question

[nervous novice]

I have a foreplay 2 that has a Hammond 369ax transformer and uses 5687 tubes. I also have a set of  Doc’s “anticipation” c4's boards and I am wondering if I can use them in it.  If so, can I use them as is or do I need to make some resistor changes in them?
Thanks as always,
N.N.

[Paul Joppa]

You will need to make some changes. Since this is a major modification of the Foreplay II, I'll need to know what the circuit values are now in order to guess what C4S changes would be desirable.

[nervous novice]

Hi Paul, Thank you for the response.
I used the resistors that you posted a while back for using other tubes in a foreplay.

  They are:
        Voltage amplifier         Cathode follower   
   
 Tube       Ib       Rk      RL              Ib              Rk       VA

5687   0.004283 350    23,816       0.009493   5,451  19.60
I hope this is what you mean.
Thanks again,
N.N.

[Paul Joppa]

Sweet!

The "Ib" column has the current for each section, and the C4S manual describes changing R1 to set the current. R2 will not have to change.

That was pretty terse, hope it's enough information. Post back if not.

[nervous novice]

Thank you very much. This is just one of the things that I love about Bottlehead. Not only do you have great sounding products, but the support is fantastic. I would also like to take this opportunity to thank everyone at Bottlehead, for not only producing these great kits, but, for introducing me to this hobby. I would have never attempted building these kits if it weren’t for Bottlehead.
   I have no formal training in electronics, or even in electricity, for that matter. Everything that I have learned about electronics over the last few years, I have learned from the Bottlehead School of Soundology and the community’s guidance.
 Thanks again,
        N.N.