Specifications

http://www.ppwatt.com
Tweed 5E3 PCB Valve Junior Conversion
Build Manual v3.0 13 Feb 2011
27 of 40
7.1.11 Input Jack complex
The VJr has only one input jack. The Tweed 5E3 has 4. You may as well make
the whole input jack complex with new materials. Save the original VJr input jack
for another project !
Look at the Chassis Layout
diagram to see how you are
going to wire together the
input jacks. I find it easier to
wire them together when
they are connected to the
outside of the chassis in their
actual mounting holes.
The first picture shows my
use of a different input jack to
WKHµVWDQGDUG¶FOLIIMDFNXVHG
on VJrs.
I used them because they
ORRNPRUHµDXWKHQWLF¶WRD
vintage 5E3 from the outside.
It happens to be stereo jack
with a DPDT switch mechanism. Took me ages to work out how to wire it
FRUUHFWO\«DQG,¶PVWLOOQRWVXUH,¶YHGRQHLWFRUUHFWO\
With conventional
cliff jacks, you will
end up with
something like
WKLV«
This is a picture
of the input jack
complex for the
prototype 5E3 I
assembled where
the 1M resistors
were on the PCB
± KHQFH\RXGRQ¶W
see them here.