AC-30 Component Layout Question

[britmusic]

Hello,

I was wondering if someone can please tell me why on the PDF layout of the AC-30 I see one .1uf at the V1-B. And two 33k resistors coming off the pins 2 and 7 of the V1 tube and function is of each is?  Also I notice that the old version of this layout dose not include these components. I have never seen a .1uf in the Top Boost section of a Vox AC-30. And I am again not sure what the two 33k resistors would accomplish.  [/img][/img][/img]

[EL34]

Moved, posted in wrong board

[sluckey]

Look at the schematic.

[tubeswell]

The 33k are grid stoppers - there to reduce RF interference


.1uF bypass cap will boost mid-hi freq at v1b

[pdf64]

The point being that the Hoffman AC30 is a different design to the 60s JMI AC30 https://el34world.com/Hoffman/files/Hoffman_AC30.pdf

[EL34]

Every one of my board kits on the library page has a link to this document
https://el34world.com/Hoffman/files/CommonHookups.pdf

Look at the input jacks in the document  above
What happens when you only have one jack per channel as opposed to two jacks?

What is the difference between the two jack layouts in the image below?