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Messages - dlbraly

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31
Amplifier Discussion / Re: Build Your Signal Generator
« on: July 21, 2018, 06:54:52 AM »
No iPod, I have a few old portable radios in the garage. I will get one.
You mentioned you plug in after the preamp. I will need help figuring out where that is.
I will take a picture of what I find.
My truck is making a popping noise in the suspension somewhere that I need to look at this morning before the heat rolls in. just waiting for some light outside.

32
Amplifier Discussion / Re: Build Your Signal Generator
« on: July 20, 2018, 10:46:20 PM »
I like the radio idea better.

I will look around for a radio, it will give me some more chances to learn something more.
Thanks Enzo!


33
Amplifier Discussion / Build Your Signal Generator
« on: July 20, 2018, 08:50:17 PM »
(Put a new belt on my Weed Wacker, Nope I didn't know they had belts either. $8 and back in business)

Signal Generator
Looks like I might have another project!

Any suggestions, things to avoid in building a signal generator?
Looks like there are a lot of kits online. Some of them look pretty complicated to me.

Do I even need one to mess around working on Guitar Amps, or radios?

This stuff is better than Legos!
Cant wait until my son is old enough to get him into it.

34
Amplifier Discussion / Re: Yamaha G100-112 - Journey
« on: July 20, 2018, 03:42:02 PM »
Yeah, I've been known to jump in with both feet.  :o

35
The Newcomer's Forum / Re: Bench Setup
« on: July 19, 2018, 09:43:56 PM »
Lets see some pictures of your set up? :dbtu:

Anyone watch Mr. Carlson's Lab? That dude has a setup.
He really looks like someone I was in the Navy with.

36
Amplifier Discussion / Re: parts
« on: July 19, 2018, 07:56:04 AM »
I figured as much, We have a Fry's Electronics not too far. I may pick some up tonight.

37
Amplifier Discussion / Re: Yamaha G100-112 - Journey
« on: July 19, 2018, 07:54:38 AM »
Um, blanking a board like that is not a good idea.  You run the risk of damaging parts in the process and making reassembly mistakes, soldering errors can occur as well.
LOL now you tell me.
Yeah, I'm learning a lot from my mistakes. I should have asked questions before starting was one HUGE mistake. Could have been a quick fix.

38
Amplifier Discussion / Re: Yamaha G100-112 - Journey
« on: July 18, 2018, 11:22:59 PM »
The MA board before and after I put everything back on

39
Amplifier Discussion / Re: Yamaha G100-112 - Journey
« on: July 18, 2018, 11:18:16 PM »
Some Pictures
Those first ones are the dirty PA board
Then The DC board before and after

40
Amplifier Discussion / Re: Yamaha G100-112 - Journey
« on: July 18, 2018, 11:15:39 PM »
OK, so changed the subject so that everything will be one place.

41
Amplifier Discussion / Re: thermal paste for Diodes?
« on: July 18, 2018, 11:13:47 PM »
Should I stick to one post and change the subject to just Yamaha G100-112?
Yes that would be easier to follow. :tu:

Adding;
Those are not diodes,, them big suckers is Power transistors.
TR311 &TR312 on the schematic.
The white goo is thermal paste, Yes same for CPU's,, all the same stuff.

The plastic pad is a mica isolating washer which isolates the case (which is also the collector) from the heat sink.
The newer pads maybe synthetic types which are are not so brittle but mica works just as well.
The thermal paste is to help transfer the heat from the collector across to the heat sink,,, and Always use it!! :trouble

When you reinstall those power transistors with washer and paste check with meter to make damn sure that the both collectors (The transistor case) is actually isolated from the heat sink otherwise it will end in tears at switch on. :o
Phil.

Thank You - Will do

42
Amplifier Discussion / Re: parts
« on: July 18, 2018, 11:10:35 PM »
I want to, but I don't have any thermal paste for Transistors that I took off.


43
Amplifier Discussion / Re: thermal paste for Diodes?
« on: July 18, 2018, 09:30:28 PM »
Should I stick to one post and change the subject to just Yamaha G100-112?

44
Amplifier Discussion / Re: How to build an amp to run on solar power
« on: July 18, 2018, 09:22:25 PM »
Yeah I see what you mean, you'd have to take a break to charge the batteries.

45
Amplifier Discussion / Re: thermal paste for Diodes?
« on: July 18, 2018, 08:59:36 PM »
Note to self 780x585 is better

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