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The lounge Relax, take a break from photo and camera talk - have a chat about something else for a change. Just keep it clean and polite!

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Old 8th March 2010
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LA2 :-) Any music technicians out there

I spent yesterday helping my step son finish off this LA2A recreation kit from Drip electronics... Oooh, its got valves and opto compressors and dangerous voltages inside. Yes, you can do it all on a chip (That semiconductors) but hey, this has got valves :-) I haven't done valves since 1971.





How cool is that. And I can report that (after a small redesign) it worked first time. Amazing.

I am putting valves in my next microprocessor design.

Pete
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Old 8th March 2010
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Re: LA2 :-) Any music technicians out there

Well, it's got real "toobs" but they are on a PCB

"Real" valve projects are hand wired, laced & loomed and use tag strips for the passive components

It is good to see valves are still being used though

Steve
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Re: LA2 :-) Any music technicians out there

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Originally Posted by Wreckdiver View Post
Well, it's got real "toobs" but they are on a PCB

"Real" valve projects are hand wired, laced & loomed and use tag strips for the passive components

It is good to see valves are still being used though

Steve
Oh yes - tagstrips. I do remember and did use them on rare occasions, but I started this electronics game in the late sixties and I steered myself towards transistors and these new fangled integrated circuits that were just becoming available. Aaah. Happy days. Still soldering. What have I done wrong?

Pete
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Re: LA2 :-) Any music technicians out there

I got my first soldering iron around 1969 - 1970 and I remember my first issue of Practical Wireless (1968 - 1969?) featured a metronome using a TIS43 (or was it a 2N2646) unijunction transistor.

Valve theory followed at Riversdale Technical College, Merseyside in 1974 - 1975. Just had a look through my drawers and found some unused Mullard OC71's with black paint intact. Remember we used to scrape the paint off to make OCP71's.

Eeee bah gum lad, those were the days of real electronics. They don't make 'em like they used to.

Steve
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Re: LA2 :-) Any music technicians out there

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Originally Posted by Wreckdiver View Post
I got my first soldering iron around 1969 - 1970 and I remember my first issue of Practical Wireless (1968 - 1969?) featured a metronome using a TIS43 (or was it a 2N2646) unijunction transistor.

Valve theory followed at Riversdale Technical College, Merseyside in 1974 - 1975. Just had a look through my drawers and found some unused Mullard OC71's with black paint intact. Remember we used to scrape the paint off to make OCP71's.

Eeee bah gum lad, those were the days of real electronics. They don't make 'em like they used to.

Steve
Blimey, Its all coming back. I tried to make an electronic organ from the same transistor about the same era. Bad idea.

I have an OC72 somewhere. Remeber S-dec and micro-dec prototyping boards??

Like you say it was all so much simpler then.

Oh well, back to the VHDL and assembler...

Pete
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Re: LA2 :-) Any music technicians out there

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I tried to make an electronic organ from the same transistor about the same era. Bad idea.
Was that the PW "Stylophone", the kit came with a clear plastic case that was very brittle and a PCB with keyboard etched into it. MINE WORKED!

Steve
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Re: LA2 :-) Any music technicians out there

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Was that the PW "Stylophone", the kit came with a clear plastic case that was very brittle and a PCB with keyboard etched into it. MINE WORKED!

Steve

Oh yes I remember it well. See, they don't make music like that any more

1968-1971 Atomic Energy Harwell - more fancy test gear than you could shake a stick at.. Then 3 years at uni learning all about life and beer but being taught nothing about electronics. From then until now - designing the stuff - analogue, digital and software.

Can I retire now and just take pictures please?

Pete
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Old 8th March 2010
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Re: LA2 :-) Any music technicians out there

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I have an OC72 somewhere.
I used to dream about owning an OC72 - the best I could afford was a 'red spot'!

Jim
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Re: LA2 :-) Any music technicians out there

Well, today is not being a good day. I am fighting some weird timing/logic state machine lockup that only happens "sometimes". I hate that kind of thing.

This is something you never got with an OC72
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Old 8th March 2010
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Re: LA2 :-) Any music technicians out there

1983 - the good old days.


Regards. Barr1e
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Old 8th March 2010
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Re: LA2 :-) Any music technicians out there

Since you are all reminiscing about the good old days, I thought I would show you a bit of real electronic stuff the "bottles" in this beast (one of a bank of more than 20 in the RAF transmitting station in Malta in 1949) were about 18 inches tall. Sorry about the quality of the photo, I didn't have my Oly then. In fact, were Olympus cameras even thought of then?

Bob (with apologies to the management for posting a non-Oly 4/3rds photo!)

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Old 8th March 2010
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Re: LA2 :-) Any music technicians out there

P.S. And I forgot to apologise for the Brylcreem.......well, it was 1949!

Bob
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