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Thanks for coming by Shonver. This expo was a great opportunity for Mars Tube Audio to showcase some of our work to new and old followers of our work. The hotel staff was also very accommodating and I loved the fact that so many people spoke Afrikaans. Well done!

The business (Mr Valve) was sold by his widow to people who traded as "Mr Valve". I did some business with them, and even collected tubes from their house in Pretoria. They had some NOS that were well priced at the time.

Ouch!

Mooi werk Emil!

Thanks for the comments John et al. I have since had another order for the 300B stereo amplifier. This time the inductors were placed on top to make more space inside for capacitors.

Hi Blackhawk, I can help you with identification. PM sent.

Interesting discussion. I still prefer FLAC; but I'm taking note of the opinions. I think I need better speakers and a quieter listening room to hear the difference.

"The Second Messiah" by Christopher Knight and Robert Lomas and "Spirit of Shamanism" by Roger N. Walsh

The customer requested a remote volume control to be added. If anyone wants to hear the amp, give me a PM. We are in Paarl.

I guess oxidation. Rust never sleeps.

I agree fredeb. Red somehow works for transformers!

Hi All, Here is some phtos of the build as it progressed. Transformers mounted: Next the two inductors of the mono/dual power supply were installed: Polypropylene capacitors and hum balancing pots next: I decided to mount the 300b cathode resistors on the side of the amplifier...

Chokes and Output Transformers ready to be fitted

I have started using 5U4/5Z3 rectifier and opted for choke input filter for the power supply. Circuit based on Western Electric 91A amplifier, modified for stereo operation. Input tube either EF86 or 6SJ7.

Hi Mario Next workshop in Cape Town is 14 and 21 October 2023. You can send us a PM to reserve a seat.

Just curious; what do you make?

I am happy with Audacious. Rock solid. Using it in Debian Linux PC.

Hi Gerry Are those 300B tubes I see on your amplifier?

I agree about the 128kB being terrible. This is the utoob standard resolution as far as I can see. I would not go under 192kB, preferring 256kB and up. AAC gives better sound than mp3 at the same resolution in my opinion. FLAC is my preferred audio codec for critical listening.

It is exciting to see the expo coming together. I'll be overseas during the expo, unfortunately, but I would like to have a piece or two on display in the common area. That probably means sharing a table with someone. Any ideas what Mars products you would like to see at the expo? 11 weeks are...