Well, it is time to start thinking about winter projects. GM70

[djn]

I can see the end of summer coming sooner than later. I've had this project on hold to enjoy the summer but I will punch all the holes in the top plate next week. Many Many holes.

[richwalters]

Yup quite right. Plenty midnight oil going to be burnt on another monster, with the slide-rule stuff completed. Again a 150+150W project using 2x quads EH KT90's with a 800W switched mode power supplies on the late night menu. A new slam driver circuitry been tested with sections ready to start the point to point.
I promised MJ with the main amp circuit diagram and this is just about completed. The prototype botch gave astoundingly good results.

The o/p trannies by Sowter UK.

richy

[djn]

ah, I love a good birds nest! Mine is 12HL7/GM70 with 850v B+. Outputs are Haybour customs. My PS is CLCLC.

[Wavebourn]

Since I sold last tube amp in the house I am going to resurrect my Tower. I built it's last version in class A+C, now going to rewire this one to pure class A like previous room heaters.

[DualTriode]

Originally Posted by richwalters

Yup quite right. Plenty midnight oil going to be burnt on another monster, with the slide-rule stuff completed. Again a 150+150W project using 2x quads EH KT90's with a 800W switched mode power supplies on the late night menu. A new slam driver circuitry been tested with sections ready to start the point to point.
I promised MJ with the main amp circuit diagram and this is just about completed. The prototype botch gave astoundingly good results.

The o/p trannies by Sowter UK.

richy

The best part is the slide rule. I still use one. Slide rules have a thinking process that requires logical organization that leads to understanding.
DT
All just for fun!

[djn]

Originally Posted by Wavebourn

Since I sold last tube amp in the house I am going to resurrect my Tower. I built it's last version in class A+C, now going to rewire this one to pure class A like previous room heaters.

What is the Tower? sound intriquing.

Originally Posted by DualTriode

The best part is the slide rule. I still use one. Slide rules have a thinking process that requires logical organization that leads to understanding.
DT
All just for fun!

I've never used a slide rule, but use to teach creativity at MTU and getting off the computer and doing something with your hands and mind always always leads to more creativity. One of these days I will take a class on how to use a slide rule....sounds like fun.

[Wavebourn]

Originally Posted by djn

What is the Tower? sound intriquing.

It's a tall hybrid:

Wavebourn Tower-III High-end hybrid amp

[richwalters]

Originally Posted by DualTriode

Slide rules have a thinking process that requires logical organization that leads to understanding.
DT
All just for fun!

One of the things seriously lacking in todays society.....the ability to tackle and solve problems in ones head rather than use the calculator as a short cut. Fine, the calculator can crunch numbers at speed but playing bridge and correct bidding is another good persuit. All reduce Age Dementia and cell wastage.
The trick with a slide-rule is remember in ones kernel where the decimal point is.
Keep at it...Without it in 1967,there would be no moon landings.
A good Pickett slide-rule can set one back $50-$100.

Drinking wine & booze and using a slide rule will create mass errors.
MJ take note !
richy

[richwalters]

Originally Posted by djn

ah, I love a good birds nest!

Some of us work with the ultimate finesse in getting a circuit to work and they work suprisingly well. Anyone not time-served in high voltage birds nesting" better avoid it. It is for the skilled practioners.

richy

[Mickeystan]

Originally Posted by richwalters

Some of us work with the ultimate finesse in getting a circuit to work and they work suprisingly well. Anyone not time-served in high voltage birds nesting" better avoid it. It is for the skilled practioners.

richy

Hello Richy,

I started home brewing as we used to call it amature radio transmitters in my earliest days of electronics 40+ years ago and made some fine bird nests too. We only took it one step further in the early days, once the bird's nest was complete, we then tuned for maximum smoke. Kind of reminds me of Tubelab's saying "Too much power is almost enough! Turn it up till it explodes - then back up just a little". . This comes close to describing how hard we would push the output power.

Mickeystan