audio-talk

Mike H wrote: ↑

Wed Oct 10, 2018 8:40 pm

Making ack-chewl noises!!
-
-
PCL86_2208-b.jpg
-

How on earth did you get my mums old clock?

It's touch and go whether my amp will be completed in time, but I'd love to bring it along if possible.

Very old school design. By which I mean heavy.

Having not been to one of these before, what's the format? Do people bring along kit for demo & comment?

I have some boards from Andrew (thanks) and will be putting in an order soon for components (after I check what I have in stock).

Anyone need any of the components for the boards? I doubt there will be enough interest to make any price difference but you never know.

I'm definitely in. Can I get the details when they're known please.

I have quite a lot of both 6SN7 and 6SL7, including the nice red RCA base ones (called "rocket valves" I believe as they were used in nuclear missiles ? urban myth ?) I'm quite happy to send a bunch to a fellow DIYer - try them and keep the ones you like, send the rest back. Pay postage and the ones...

How about

https://uk.rs-online.com/web/p/through- ... s/6831059/
or
https://uk.rs-online.com/web/p/through- ... s/4852906/

RS postage is free even small orders

Yes I was having a rummage last night searching for my stock supplies of comps - no B9A sockets! Used 'em all on the EL84 push-pull ... Also, was sure I had a couple of spare Cosmos Tocos pots, but blessed if I can see 'em. But got an eBay order out, + the sockets. I have lots of spare B9A sockets....

mainscablesrus wrote: ↑

Sat Aug 18, 2018 6:56 pm

I have penciled the next meeting in for Sunday 30th September all being well.

I'm definitely interested in this. I may even bring an amp.

Are the details in the thread? Do I need to get added to a list?

I really need to get back on the bike. Haven't touched it this year, mostly due to hifi building!

Perhaps I'll cycle to the next Owston - but not if I'm taking my new amp which I'm expecting to weigh in at around 20kg (the PSU around the same). Perhaps some sort of trolley arrangement...

I have had high Voltage on the secondary side of something, that is 'floating', due to inter-winding capacitance maybe, but was a long time ago so can't remember the details. I mean relative to mains earth. Ideally you want to connect the secondary side ground to mains earth, and have some sort of ...

When mounting the large boards to a chassis or copper sheet, what size of nylon support pillars should be used? I've been using 6mm and they work but just feels like there's tension between the transistors (which screw flat to the copper) & the board (which is held off by the 4 pillars). Would 5mm b...

Problem solved. I realised the 2 boards I want happy with were the first board I built, and I'd never built a PCB before that. Sure enough there were some joints I was less than happy with. Reworked those and all is well. I've now built 24 of these boards (16 large, 4 small) and I'd like to think I'...

No actually even targeting 2.5v it's slow to rise, just less noticeable. After about 10 minutes it gets to 2.44v. Temperature of both D44H11 & LD1085P are stable (around 44 & 54 deg C respectively, bolted to a 3mm copper sheet). To be honest I could live with it, but I don't like things not being ri...