I’m running into preamp tube plate voltages that seem to be high. I don’t have a reference, so it would be cool if folks could submit voltage charts that Dr. Andrea could include on the resources page.

This is basically what I had in mind

Power transformer: (i.e. 320-0-320)

Rectifier: (i.e. GZ34, 5U4, SS)

Tube. Type. Pin1. Pin2. Pin3. Pin4. Pin5. Pin6. Pin7. Pin8. Pin9

V1. (12ax7). (Plate2) (Cath2) (Plate1) (Cath1)

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gabriel

October 20, 2024

Source Parts Pricing

So, I've started my SLO-build by ordering PCB and chassis.

When i start ticking of parts from BOM I'm a bit confused regarding part prices and availability. I know it says "...indicative only..." but that's not really true i think. Some posts are a bit higher but on capacitors and resistors there are really big differances. Since revision 1v1 is from 28 september this year i assumed the prices/recommendations were reasonably up to date. Can I search other parts based on values or is there a reason you listed parts in BOM?

Examples:

C11 | 1uF/100V | Mallory 150 | 150105J100IC | Bom Cost: € 0.92 |Mouser.co.uk: € 3.50 |Difference:…

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gabriel

Oct 30, 2024

Hi Andrea and thank you for the reply.

I think you don't have to provide the pricing at all. Links to the products that you recommend is plenty in my opinion.

On another note. In the SLO-100-LDR, shouldn't P4, P9 and P10 terminals #3 go to ground? I am a total noob when it comes to electrics but better ask I think.

Salve

Gab

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