Yes, not a radio but yet another amplifier!
I seem to be locked into a time loop back to the 1980's making valve guitar amplifiers for fun.
This effort is a band practice unit mainly for Bass work.
The difference is here I have used transistors in the output and easily available transformers.
Just to show it can be done!
After this I will make up a full transistor unit just like I made in the 1970's.

I looked back at the radios I have written about for this site and don't think there is much more I can do.
There is about 70 projects in all, about 1/3 radio restorations, 1/3 scratch built receivers and 1/3 stuff like amplifiers, test gear, various topics.
I am a bit puzzled that other guys/gals have not posted a similar amount of articles on scratch built, repairs or valve style topics on this site.
Why?
The funny thing is I don't have much to do with the "Radio" hobby, or it's not my only hobby.
Actually all my hobbies turned out to be part of jobs I have worked in, within industries, so much that the lines blur over and its all just a 24 hour a day hobby!
Any way time for me to 'retire', you are supposed to that when you get to 60 years or so, I missed that event about 20 years ago, too busy with 'hobby' work!

Thats me rambling, I'll send the usual PDF to Brad to pin to this post.

Cheers, Fred.

Woden Hybrid Bass Guitar Amplifier

Document uploaded.

Congrats on another working project, Fred. It is amazing what you manage to come up with.

Yes, Fred is a genius at this kind of thing.

So, Jaycar selling fake TIP35/TIP36 ? That's disturbing.

At least the 2SA1695/2SC4468 worked out. Looks like they can be ordered from overseas at less than $10 each - but will they be real ones?

Hi Rob, well I cannot speak for Jaycar as I don't work there any more.
I'm not going to bother to follow up either I am too old to argue with stupid people.

All I can say is the TIP35's failed in a dead safe circuit I have used for many years.
I have amplifiers working in use for years up to 500 watt using TIP35/36 transistors, no failures.
I'm glad I have boxes of N.O.S. chips and SS items from the 1970's to 2000 that I can play with in projects!

Back in the day fake SS items were a vexing issue and only testing at full power could sort them out.
The struggle was always stopping our purchasing departments buying from suppliers who had low quotes.
"But they are cheap" was the cry, "look at the profit!" "but they fail" I would say.as sales dropped to zero.
Solution: get rid of testing!

Anyway, learnt my lesson i'll stick to my real old stock!

Standby for the next amplifier, a full transistor model.

Fred.

Cheap & sales people buying that way, whilst knowing absolutely nothing about the product they are buying for and deviating from original specs.

The shock horror last week was related to a 1956 tractor. Owner had bought a pre fabricated wiring loom, a new mechanical Voltage regulator and an ignition warning light:-

The warning light had flying leads, it could short to the frame & was incompatible with the new loom as it had eye terminals to fit the original one:

The Voltage Regulator has bullet connectors; The new loom has the bullets soldered on. Again, incompatible with the loom, as there is a Bakelite plate with 5mm holes to hold the 5.5mm bullets in. So it should go onto the wires in the order retaining plate, rubber gasket, Bakelite plate and then the bullets. Making extra work.

The loom has some cloth covering, but they also skimped on that.

They also modified the thermostat housing, obviously in the name of cheap and the capillary tube, of the (mechanical) misses the fan by very little (Stupid idea).

Had I known that the loom was going to be bought; It would not have happened. Not value for money. It made me pleased that back in the 80's I carefully ripped out the failing cloth rubber wire in mine, Noted the points need in improvement & built a new one, using modern cloth cover wiring & loom cover of the time. Its still there.

There are penalties for cheap and nasty and can be ramifications for modifying.