Express Tweakers Kit

Express, Liverpool, Rocket, Dirty Little Monster, etc.

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Decko
Posts: 309
Joined: Sat Feb 23, 2008 8:36 pm
Location: California

Express Tweakers Kit

Post by Decko »

Hi All,

The Worley BOM has a Tweakers Kit table on both the "Resistors" tab and "Capacitors" tab. I assume :roll: that one can "tweak" the circuit with these different values for the caps and resistors. For example, on C8 of the Express schematic (2-3 stage coupling) one can use a higher value to change the low fequency response of the amp. Correct?

I built my Express "copy exact" to the schematic and it rocks hard through my 4 X 12 Pre-Rola loaded Marshall!

That said, what are other interesting tweaks one can do to the various stages of the Express?

Thanks!
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gearhead
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Location: Virginia (Fairfax)

Re: Express Tweakers Kit

Post by gearhead »

Ron's BOM is loosely based on a BOM I did back in 06, which was my compilation in excel of a number of different sources floating around at the time: https://tubeamparchive.com/viewtopic.ph ... hlight=bom

To get some of the inital tweaker kit values, and what they are good for, got some inputs as follows: https://tubeamparchive.com/viewtopic.ph ... ight=tweak
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Ron Worley
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Re: Express Tweakers Kit

Post by Ron Worley »

Yup, Gearhead is the original author, I just embellished it a bit!! :wink:
Ron
Decko
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Joined: Sat Feb 23, 2008 8:36 pm
Location: California

Tweaks

Post by Decko »

Thanks Gearhead and Ron! My inquiry into he "tweaks" is motivated by the desire to customize tone based on speaker choice. I understand that Ken would design an amplifier circuit with the speaker in mind and tune around that.

I would like to ask you experienced amp builders if you could share your thoughts on this subject. Rather than matching speakers to the amp, can I tune my amp circuit to the speaker? Celestion Blues work well with this cap in stage "X" or G12H 30's work well with resistor value in stage "X".
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gearhead
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Location: Virginia (Fairfax)

Re: Express Tweakers Kit

Post by gearhead »

Ron Worley wrote:Yup, Gearhead is the original author, I just embellished it a bit!! :wink:
Embellish? Hah. You took it from a crude listing to a complete product that just happens to be in a similar format.

Ron deserves all the Kudos that could possibly come his way!
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