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I have one RCA 2A3 waiting for a single ended amp to happen. I miss the clear and punchy sound of the 2A3.

Look in the chinese shops downtown. I sporadically found some incandescent tubes between the electrics section. Unfortunately they do not last long in normal application, but as loads in your "soft start" they should last indefinitely.

You won't find anything. If the board has been butchered, I would walk away and find something useful to do with my time. (I have actually had a few Dixon products over the years on my bench, mostly from clients who live in the flats opposite our house, and who can see that I work on...

Next we connected up the heater circuit. This is quite simple: all tube's heaters are connected in parallel. Three things to take into account: keep all the heaters in phase ("yellow" goes to same connector on all tubes; and same for "white") the left side and the right side's tubes have...

Next we chose to mount the speaker binding posts: Here is an example of what we're aiming for: I suggested that he solder them in place, but the builder pointed out the screw terminals in the actual binding posts Job done:

Mount the IEC inlet. Should be self explanatory. Mount the fuse holder. Here we ran into the problem of the fuse holder not fitting the hole (a common problem). What is needed is the removal of paint on the inside of the hole. A boxing knife or scalpel should do the job. Next we do the power...

Thanks Curlycat. If anyone wants to do a similar workshop, PM me for costs and options.

Starting point: transformers mounted with all the leads facing the right way. Two preamp tube sockets needs 180 degree rotation. I suggested a bottom mount to the builder and he agreed: Job done! Next we start work inside the enclosure:

Hi All I am doing a virtual workshop for a client who is building the Mars Kit 2 Mk 2 amplifier at home. This might also be useful for anyone wanting to try and do the same. Contact us to order a kit, if you do not have one. You'll see the enclosure in the thread is slightly different to the...

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Those MOJO's catch my eye. I've read some good interviews in them.

For the moment we'll be keeping to the WE91 design using a 6SJ7 to drive the 300B. Let's look at the power supply. The design is a dual power supply using one power transformer and rectifier. After the rectifier we'll split the power supply into two parallel units with their own...

I have an interesting version of the Dynaco ST70 on the bench for a service. I took some photos: The unit had four KT77's in the output stage. Two of them were faulty, so I temporarily fitted a pair of used Shuggies while we wait for the delivery of the new KT77's. On the photo I have fitted...

Dates updated.

Hi All DIY Tube Amp workshop in Gauteng 2023 on 28 and 29 October. If you want to build your own stereo tube amplifier, then this two day course will get you a working amp. If you are not available on the Sunday, we can get you started on the Friday 27th and you complete on Saturday...

We have a new entry level tube amplifier available for sale on order: Price: R14 900 all include (terms can be negotiated) also available as kit - Price: R 9 900 10 watt music output per channel ECL82 tubes in push-pull configuration single stereo RCA input Speaker impedance: 6 - 8ohm...

If you have been wanting to hear the sound of vacuum tubes in your home hifi, the Mars Buffer will do the trick. Priced at R4 900 it is a useful device with many applications. from the web: "A tube buffer is basically a passive pre that allows you to introduce a tube sound to the signal...

Checkin it out right now!

That looks interesting. I know Steve'n'Seagulls ( ) version of "Thunderstruck".

I checked the height of the Linlai tubes I received for the build: 135mm height excluding pins Unfortunately the VU's i received were not what I wanted I need a white pair for this build.