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| | |-+  Preamp section for a 1W Dumble - why was it changed on the OTS Mini Lunchbox?
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Author Topic: Preamp section for a 1W Dumble - why was it changed on the OTS Mini Lunchbox?  (Read 424 times)
jaymenon
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« on: August 06, 2023, 01:20:09 PM »

It's a dream of mine to have a low output Dumble - for practical reasons Nik cannot make me a custom 1W job.

So I thought of going with a 12AU7 output section (single ended or push-pull)

A question please for you knowledgeable folk:

When Ceriatone made the OTS 20 they changed to a new preamp configuration.
Is that because the preamp from the 50W amp will not work nicely with a lower output power amp?

What further changes might I need to make in order for it to work with a 1W output power amp section

https://imgur.com/Jh28sUx

Expert opinions most appreciated...
Jay


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jaymenon
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« Reply #1 on: August 06, 2023, 01:27:03 PM »

Here's a table of the preamp pot values


* Dumble Preamp Sections.png (52.06 KB, 996x268 - viewed 74 times.)
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