Search found 9361 matches

by Paul Barker
Tue Dec 03, 2024 10:02 pm
Forum: Assorted Stuff
Topic: Nothing In Particular
Replies: 16867
Views: 5918378

Re: Nothing In Particular


Sounding good is better than looking pretty.

Sounding good and being safe enough not to injure/main/kill small animals (incl. children) is a bonus.

Yes. And when I’m upstairs on 3’rd floor If Sam has left Roxy our Staffie shecomes straight upstairs to see me. So its a plank of bamboo relay ...
by Paul Barker
Tue Dec 03, 2024 2:02 pm
Forum: Assorted Stuff
Topic: Nothing In Particular
Replies: 16867
Views: 5918378

Re: Nothing In Particular

Thanks
by Paul Barker
Tue Dec 03, 2024 9:38 am
Forum: Everyones Projects
Topic: A less Simple GM70 Amplifier
Replies: 3
Views: 1000

Re: A less Simple GM70 Amplifier

Image

Now that its all Octal barr the GM70……

Image
by Paul Barker
Mon Dec 02, 2024 6:23 pm
Forum: Assorted Stuff
Topic: Nothing In Particular
Replies: 16867
Views: 5918378

Re: Nothing In Particular

Thanks!
by Paul Barker
Mon Dec 02, 2024 5:58 pm
Forum: Assorted Stuff
Topic: Nothing In Particular
Replies: 16867
Views: 5918378

Re: Nothing In Particular

This is probably a good time to say. I’ve come to realise I cant make any amps or power supplies into boxes. My left hand has a long way to go. Though I need to use it its baby steps.

So what Ive decided to do is buy more octal relay bases and use only octal valves, but also the GM70’s. Might ...
by Paul Barker
Mon Dec 02, 2024 5:47 pm
Forum: Assorted Stuff
Topic: Nothing In Particular
Replies: 16867
Views: 5918378

Re: Nothing In Particular

Lots of stuff in our pursuit’s are costly.
by Paul Barker
Mon Dec 02, 2024 2:25 pm
Forum: Assorted Stuff
Topic: Nothing In Particular
Replies: 16867
Views: 5918378

Re: Nothing In Particular

I dont agree with Sowter when you wind a power transformer you choose the core size by the power only half the centre tapped winding is working at a time. So the current through half the winding is taken into account. The core and A which is the core suface area is measured for that duty. Which is ...
by Paul Barker
Mon Dec 02, 2024 2:20 pm
Forum: Assorted Stuff
Topic: Nothing In Particular
Replies: 16867
Views: 5918378

Re: Nothing In Particular


I'm having a moment and can't convince myself I'm correct. With a traditional centre tapped mains transformer intended for full wave rectification, if the whole of the secondary is used with bridge rectification the current capacity of the secondary should be halved (compared to full wave CT ...
by Paul Barker
Mon Dec 02, 2024 6:33 am
Forum: Stacks
Topic: Micro-cap
Replies: 5
Views: 687

Re: Micro-cap

I read that sentense sequentially as a dyslexic person well one like me, does. So its good news then bad news. But what was I expecting? Nada. I wasn’t dissappointed.

Im probably better off with my way of designing amps without spice anyway.
by Paul Barker
Mon Dec 02, 2024 6:30 am
Forum: Everyones Projects
Topic: Amp No 46
Replies: 20
Views: 7676

Re: Amp No 46

Good to know
by Paul Barker
Sun Dec 01, 2024 3:15 pm
Forum: Stacks
Topic: Micro-cap
Replies: 5
Views: 687

Re: Micro-cap

Too much to hope for EL38
by Paul Barker
Sun Dec 01, 2024 11:20 am
Forum: Everyones Projects
Topic: Converting EL38 amp to 300b Amp
Replies: 9
Views: 1521

Re: Converting EL38 amp to 300b Amp

https://i.postimg.cc/MH4ZPhLS/image.jpg

As its monoblocks in one box every filtering section is duplicated.
Plenty of room above the plimsole line for these chokes on top.

And to show the duplicares.

https://i.postimg.cc/HxkppYDm/image.jpg

The caps paired with the chokes probably ...
by Paul Barker
Sun Dec 01, 2024 10:00 am
Forum: Everyones Projects
Topic: Converting EL38 amp to 300b Amp
Replies: 9
Views: 1521

Re: Converting EL38 amp to 300b Amp

The circuit now Ive landed in Appolo crash and burn.

Image

Oops I fogot that circuit requires 4 PL/EL 38’s.

Queue another picture.

Image
by Paul Barker
Sun Dec 01, 2024 9:56 am
Forum: Everyones Projects
Topic: Converting EL38 amp to 300b Amp
Replies: 9
Views: 1521

Re: Converting EL38 amp to 300b Amp

Anyway Major Tom to Ground Control. I have this Chassis, which the 300b amp is small enough to fit in. The R core OPT,s should fit inside. For the off board power supply I have some 400v power transformers which as they arent centre tapped I’ll use two hexfred bridges matching chokes matching caps ...
by Paul Barker
Sun Dec 01, 2024 9:05 am
Forum: Stacks
Topic: Micro-cap
Replies: 5
Views: 687

Re: Micro-cap

All ears my spice so far is “no spice at all!”!