Search found 3946 matches

by Ray P
Fri Jul 03, 2020 5:05 pm
Forum: Buying and Selling
Topic: Horn Speaker Cabinets on EBay
Replies: 10
Views: 169

Re: Horn Speaker Cabinets on EBay

Is it only me that’s been eying up the acrylic at super market, Nope, not just you Paul. The Tesco store I use has just added new screens at the self service checkouts so they can open them all up again; the screens are acrylic, about 1.8m tall and 0.6m wide and because of the dimensions, quite a s...
by Ray P
Fri Jul 03, 2020 4:59 pm
Forum: Beginners
Topic: Tapping.
Replies: 11
Views: 87

Re: Tapping.

Ali Tait wrote:
Fri Jul 03, 2020 4:56 pm
Used to use Vaseline, just dip the tap in it. Cue DTB. :D
Spice up your life - try Vicks
by Ray P
Fri Jul 03, 2020 4:57 pm
Forum: Assorted Stuff
Topic: what are you doing ?
Replies: 527
Views: 18038

Re: what are you doing ?

Just having a coffee - busy day so far. I've done some work on both the 13E1 and 6C33C amp projects earlier (added the feet to the bottom plate for the 13E1 so I can install it later and have been assembling the power supplies for the 6C33C) and this afternoon I've done some work on the garden, main...
by Ray P
Fri Jul 03, 2020 4:49 pm
Forum: Assorted Stuff
Topic: Nothing In Particular
Replies: 11634
Views: 1036662

Re: Nothing In Particular

With all the financial implications for the country of the Covid-19 emergency, along with it's relative proximity to the 2008 crash, I got to thinking about how ignorant I am about the workings of the global economic/financial 'machine'; I didn't really know about basic things like 'where does the g...
by Ray P
Fri Jul 03, 2020 9:37 am
Forum: Everyones Projects
Topic: Another MoFo
Replies: 154
Views: 1621

Re: Another MoFo

Fair enough, I've always thought of it as a power buffer but I can live with that.

Must be off though, I've got holes to drill and tap!
by Ray P
Fri Jul 03, 2020 9:02 am
Forum: Everyones Projects
Topic: Another MoFo
Replies: 154
Views: 1621

Re: Another MoFo

Priceless! :lol:
by Ray P
Fri Jul 03, 2020 12:03 am
Forum: Everyones Projects
Topic: Another MoFo
Replies: 154
Views: 1621

Re: Another MoFo

Fine, that sentence contains the word teach which describes how information can pass between two people. Your original statement didn't contain a similar verb. No,teaching was implied in my first sentence referencing my dad, as would be understood by most people in everyday communication. Then of c...
by Ray P
Thu Jul 02, 2020 11:52 pm
Forum: Everyones Projects
Topic: Another MoFo
Replies: 154
Views: 1621

Re: Another MoFo

Nick, how can I be creating a problem when I've already experienced it practically The problem I refer to is the added complexity that is being added to the thread about possibly the simplest power amplifier in the world. adding a disagreement about the relative "softness" of various materials. Tha...
by Ray P
Thu Jul 02, 2020 11:38 pm
Forum: Everyones Projects
Topic: Another MoFo
Replies: 154
Views: 1621

Re: Another MoFo

Nick wrote:
Thu Jul 02, 2020 11:18 pm
I understand about different alloys, my dad worked with them at Follands/Hawker Siddeley,
AFAIK, generally learning is not passed genetically between generations.
AFAIK I'm not related to Mr. Kerley but he managed to teach me about Geography and Geology.
by Ray P
Thu Jul 02, 2020 10:29 pm
Forum: Everyones Projects
Topic: Another MoFo
Replies: 154
Views: 1621

Re: Another MoFo

Phil, I understand about different alloys, my dad worked with them at Follands/Hawker Siddeley, but it's academic because I don't make heatsinks, I buy them and the larger ones I've bought and tried to tap have all been 'soft' and the success rate variable - I suspect it's an aspect of the heatsinks...
by Ray P
Thu Jul 02, 2020 7:16 pm
Forum: Everyones Projects
Topic: Another MoFo
Replies: 154
Views: 1621

Re: Another MoFo

Heatsinks are usually of a soft material, normally aluminium but sometimes copper. M3 is a fine thread and not the easiest to get really tight when tapped by hand. Steel bolts are hard. It doesn't take much over-tightening to strip the thread or pull a stud out of the thread. I speak from experience!
by Ray P
Thu Jul 02, 2020 6:46 pm
Forum: Everyones Projects
Topic: Another MoFo
Replies: 154
Views: 1621

Re: Another MoFo

Nick wrote:
Thu Jul 02, 2020 5:54 pm
Why? If you tighten it too much you will cut through the insulator.
and possibly pull the stud out of the soft heatsink. Anyway, the device datasheet tells you the recommended torque.
by Ray P
Thu Jul 02, 2020 6:40 pm
Forum: Buying and Selling
Topic: Horn Speaker Cabinets on EBay
Replies: 10
Views: 169

Re: Horn Speaker Cabinets on EBay

Paul Barker wrote:
Thu Jul 02, 2020 6:20 pm
So I put the thought in room 101
Good decision (IMO of course). Looking at the pictures the horn profiles seem to widen and then narrow randomly and the two don't even look the same.
by Ray P
Thu Jul 02, 2020 1:49 pm
Forum: Everyones Projects
Topic: Another MoFo
Replies: 154
Views: 1621

Re: Another MoFo

Nick wrote:
Thu Jul 02, 2020 1:25 pm
I would keep all leads as short as possible.
Agree, was only suggesting an extension long enough to get the Mosfet from being hidden under the board. As I understand this to be a 'prototype' I thought a bit of flexibility might be handy - can then go an optimal assembly on the proper build.
by Ray P
Thu Jul 02, 2020 12:49 pm
Forum: Everyones Projects
Topic: Another MoFo
Replies: 154
Views: 1621

Re: Another MoFo

For mounting the Mosfet you could use two larger thread holes, one either side, and clamp the Mosfet in place with a shorth length of U channel; with your PCB you would need to have the Mosfet on short leads though, but then maybe leads with a connector would be useful if you plan to kill a few Mosf...