Reviving Vintage Amplifiers with Spirit Cleaning - A Discussion on Electronics Forum

Hello. I'm not sure if I'm writing in the right place. Maybe others will also benefit from it. I have some old Unitra amps. They sound great after a few remixes, but the records are terribly dusty. The amplifiers were lying in the basement for 10 years. Now I wanted to make plexiglass cases, but it will look terrible if I don't clean it. If I pour alcohol or denatured alcohol on the CD, nothing will happen to the elements and everything will sparkle? Is there maybe some other measure that can be used for such a purpose? I greet everyone.

the spirit is safe for electronics, but you get a better cleaning effect using e.g. Cleanser

There are probably many resources available on the market. I tested isopropylene alcohol - it removes dust, grease and moisture.

That's what I meant Thanks transpacyfic93, why not show, it will be great I will stuff with 100 diodes and all this is controlled by miqroprock I think it will be worth the boast

adaminek18 wrote:

why shouldn't I show it, it's gonna be great I will stuff with 100 diodes and it's all controlled by miqroprock I think it will be worth the boast

That's why don't show it, the electrode is unlikely to tolerate it.

I will not comment on making such Christmas trees from amplifiers or controlling "miqroprock" "something that does not need it at all, because this is not a topic, but I advise you to think about what you are doing ...

PS I can take the old cases.

That too, but apart from unitra amateurs, there are also people who are fed up with watching trinkets in which the more plexiglass and blue LEDs, the "better".

I actually put myself wrong then, when I said modifications, I meant the replacement of electrolytes and power amplifiers. As for these LEDs, I really freaked out and I apologize to all Unitra fans. But is it normal that only one channel can play at a time? Because they play separately for me (either A or B), while together (A and B) there is no signal. Greetings.

adaminek18 wrote:

... But is it normal that only one channel can play at a time? Because they play separately for me (either A or B), while together (A and B) there is no signal. Greetings.

some amplifiers, when you switch to A + B, connect the speakers in series, then all of them must be plugged in.
When it comes to cleaning - the coolest and cheapest is isopropylene spirit - you can buy it in chemical centers.

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Note - denatured alcohol is not spirit - it is muck that remains for Polmos while producing booze !!! There are various acids and oils in it, and also contaminants. Isopropyl is OK, leaves no white streaks like drinking spirals.

Hello .
It is not so that the "plywood" from the field is some strange sewage - I worked there for several years. Different products under the name of denaturax, denturaks, etc. are different - it can be different here. Nevertheless, you have to be careful that you do not get washed away from some of the descriptions on the elements (if it is important). You can try extraction gasoline - not white spirit - but be careful! -vapors can BUM!
greetings .

And such extraction gasoline - not mineral spirits, straight from the dispenser ??

"But wogule, I don't know what you want to do?"
-But I wrote in the first post what I mean.
"Not at all" is spelled with "ó".
"Leave A Unitre alone" - I absolutely do not intend to, because as I wrote, I replaced a lot of elements and I am enjoying its great sound.
I am not going to tune the enclosure either, I also wrote about it.
A colleague is not reading with understanding.
Greetings.
Adam

s_z_a_m_a_n wrote:

Certainly not, I think it's about purified gasoline ... there was once something like TRI that also cleaned well.

With TRI (trichlorethylene), I advise you carefully:

1. Extremely flammable.
2. Hallucinogenic.
3. Forbidden.
4. Dissolves plastics.

TETRA (carbon tetrachloride) was used for cleaning, not TRI. Also nasty and solvent, but non-flammable. Currently banned.

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According to Wiki - non-flammable. So in Poland it was available contaminated with other non-polar solvents.

I would like to see at least what it was like "once".
According to the story, there were absolutely no problems with the necessary electro components. or just such mixtures But on the other hand, it was harder to get food ... The vinegar was bought by electronics ??

You are a bit wrong - you went to the store with a list of elements and you needed a 1 / 8W resistor, you got a value of 20% more or less and, additionally, a 2W MŁoTa
But it's easier now.

Hello.
Do you think the "original" cemi elements were so great?
Was (e.g.) ul1042 better than the original?
I personally doubt it.
Greetings .

UL1042 is a balanced modulator designed for VHF heads? Nice layout - I made an adjustable m.cz muffler on it. But repeatability is poor

Hello.
Yes, it is generally a balanced mixer (not only for the heads).
And repeatability and noise.
It's just aside from the discussion about washing the elements.
Don't just use acetone - it's extremely aggressive (for a solvent), flammable and toxic.
Greetings .

Hello .
I completely agree here. If something is to have the value of originality, it should be as close to the original as possible.
That's why I used to look for a rear light for an AJS motorcycle for a year - and found it.
Greetings .

Colleagues, the disc can be cleaned with "denatured alcohol" and isopropyl alcohol and extraction gasoline - just be careful and do it quickly - I also advise you to remember that ethyl alcohol dissolves rosin - there may be streaks after the first wash, extraction gasoline can dissolve solder paste (i.e. anyway, rinse again after washing). As for acetone - I advise against it - it evaporates too quickly and too aggressive.
knocks - it must also be added that there may be sediment left after the "inner tube" and the wax could also be used - as long as everything was washed with extraction (lacquer is higher refining fractions - means more boiling and more difficult to evaporate).
RoMan - the tri was not entirely hallucinogenic on its own - on the other hand, it could have happened easily (after a slight modification). Tetra, on the other hand, can be used in the production of smoke candles )

Ps
adam - I don't know if you know, but by using ethyl alcohol (pure) with dissolved dyes - you can tint the "plexiglass".
If anyone is interested in how - let me know
Ps 2.
Washing should be done in a well-ventilated room and away from open flames ...
Ps3
"Plexiglass" can be glued nicely (welds are almost invisible)

Welcome back! And when it comes to this Cleanser, is it better to use it in a spray or maybe in a liquid form? Well, do I think that the liquid one is enough to pour it on a dirty disc and the dirt will come off by itself? Rather will the subtitles be destroyed? Greetings!

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About MC 023 (and derivatives)?
Personally, I have not used any of them (I have access to solvents ).
See also others - eg "Amber-Amberton" or other To view the material on this forum you must be logged in. .