Another MoFo

What people are working on at the moment
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Ray P
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#136 Re: Another MoFo

Post by Ray P »

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 being extruded - and particularly problematic with small threads like M3. I've had no issues cutting M3 threads by hand in other materials.

Nick, how can I be creating a problem when I've already experienced it practically - I'm speaking from experience and, yes, the technique you describe is the one I used.

Anyway, the solution I use now is to not tap threads by hand but to get them done properly (its good to have a friend into model engineering!). If I were to buy another modushop chassis I would probably pay the extra to get them to drill and tap the heatsinks on their CNC machines and just be done with it.

Tomorrow I'll start to assemble the heatsinks for the 6C33C power supplies and current sinks they were dropped off to me earlier today, complete with pristine M3 tapped blind holes!
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Nick
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#137 Re: Another MoFo

Post by Nick »

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. That problem. Not that you have managed to strip a thread in the past.
Little known fact, coherent thought can destructively interfere with itself leaving no thought at all, that’s why I prefer incoherent thought.
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Nick
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#138 Re: Another MoFo

Post by Nick »

I understand about different alloys, my dad worked with them at Follands/Hawker Siddeley,
AFAIK, generally learning is not passed genetically between generations.
Little known fact, coherent thought can destructively interfere with itself leaving no thought at all, that’s why I prefer incoherent thought.
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pre65
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#139 Re: Another MoFo

Post by pre65 »

As a result of the heatsink/tapping discussions I found a couple of things.

1) a thread rolling tap, does not cut a thread but deforms the aluminium, needs a different size hole to start.

2) a set of 3 taps where the tap size for taper and second are smaller, and plug finishes the thread to size.

But I'll stick to the way I know. I have ordered a better quality M3 taper tap.

Anyway, still not got the spacers I need so as to mark out the FOUR holes to hold the PCB down. Friday I hope.
Life is what happens to you while you're busy making other plans. John Lennon

G-Popz THE easy listening connoisseur. (Philip)
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Ray P
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#140 Re: Another MoFo

Post by Ray P »

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.
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Nick
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#141 Re: Another MoFo

Post by Nick »

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.
Little known fact, coherent thought can destructively interfere with itself leaving no thought at all, that’s why I prefer incoherent thought.
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Ray P
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#142 Re: Another MoFo

Post by Ray P »

Nick wrote: Thu Jul 02, 2020 11:16 pm
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. That problem. Not that you have managed to strip a thread in the past.
To me it's not a problem; fortunately, this is just a hobby and there's no real implication to having a 'garden shed' conversation like this.

Last time I looked he MoFo wasn't a power amplifier.
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Ray P
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#143 Re: Another MoFo

Post by Ray P »

Nick wrote: Thu Jul 02, 2020 11:46 pm 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 course there's the possibility that the person I refer to as 'dad' isn't a genetic relation anyway. Ironic that the original point was a view about overcomplicating something.

Time for my beauty sleep... Sleep well and stay safe :brushteeth: :sleepy1: :sleepy2:
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Paul Barker
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#144 Re: Another MoFo

Post by Paul Barker »

I have to say I did like Nick’s succinct way of puting the whole dreary heatsink thing into perspective. I recall a time when more than 50% here would have piped in sooner sith statement’s oft quoted here in the past such as valves bring their own heatsink, in fact pretty sure Nick coined the phrase in this place at least, unless it was a few of us in conversation including Nick.

I illuded quite a few pages back to the fact there was a rediculous outweighting of this project building a Mofo by obsession with what ought to have been decided upon, done and dusted in a single post.

It’s cemented my resolve to stick with valves.

I know Ray and Phil fairly well, and like Ray said it’s a couple of men geting on in years, with other experiences of metalurgy thta are focusing on the qualities of the bark on every tree in the woods, but no idea what they came to the woods and can’t see the overall picture so don’t know how to get out of the woods or see what the wood looks like as an entity.

I know mofo has come highly recommended by Steeve, and since he has a rather nice lathe and plenty of hand skill as I’ve seen his excellent work not just in these audio projects, but like Phil motorbikes and his building trade work at home. But I thank the Lord that he has kept perspective in his contributions to the thread.

As an outsider to me it’s either a very strange project which is made to a-pear cluttered with busy little details which might be getting a little obsessive but more actually a vehicle for willy waving ones infinitesimally detailed specific abilities to know about aluminium.

Me I hate the stuff to machine and that’s my one contribution and I’m done with the matter of what should be so simple, buy a whacking big heat sink, attach what needs cooling to it including heat transfer paste, and get on with it.
"Two things are infinite, the universe and human stupidity, and I am not yet completely sure about the universe." – Albert Einstein
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Paul Barker
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#145 Re: Another MoFo

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Or to put it another way, its now reached the stage where John Cleese and company could portray a hilarious sketch out of it.
"Two things are infinite, the universe and human stupidity, and I am not yet completely sure about the universe." – Albert Einstein
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Ray P
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#146 Re: Another MoFo

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Priceless! :lol:
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Nick
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#147 Re: Another MoFo

Post by Nick »

Last time I looked he MoFo wasn't a power amplifier.
Really? It provides current gain, what’s not a power amplifier about that?
Little known fact, coherent thought can destructively interfere with itself leaving no thought at all, that’s why I prefer incoherent thought.
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Ray P
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#148 Re: Another MoFo

Post by Ray P »

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!
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pre65
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#149 Re: Another MoFo

Post by pre65 »

Paul Barker wrote: Fri Jul 03, 2020 7:35 am
, buy a whacking big heat sink, attach what needs cooling to it including heat transfer paste, and get on with it.
In effect, that's what I am doing. :)

Let us not forget that there are people who read these threads who may not know some of the detail regarding heat sinks and thread tapping, and who may have gleaned a idea or two. I did.

I'm not sure if "willy waving" is an issue, but in these troubled times being stuck (mainly) indoors perhaps some of our temperaments could become a little frayed ?

So folks, just give us "shed talking willy wavers" a bit of maneuvering room please. :lol:
Life is what happens to you while you're busy making other plans. John Lennon

G-Popz THE easy listening connoisseur. (Philip)
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#150 Re: Another MoFo

Post by steve s »

You crack on Phil.. I'm enjoying your thread,
The tube manual is quite like a telephone book. The number of it perfect. It is useful to make it possible to speak with a girl. But we can't see her beautiful face from the telephone number
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