All things G1176 - the new "repost" thread.

[stefan]

[quote author="astrovic"]I take it you meant -10, not -30?

I checked for -10 after R85 rather than checking after the 1N4003's. This is the spot to check - see here. I'd work through the first part of this dealing with getting the PSU section right to see if it throws any light on your situation.[/quote]If I measure after R85 I would surely want -10, but if I measure right after the diodes, with nothing but the diodes and transformer in the circut, I don´t understand why I shouldn´t have -30?, well I have another board and another transformer so I´ll just build the PSU up on that one and see what I get. Thanks for the link, very informative. :thumb:

 

[stefan]

I changed the 1N4003s cleaned up the soldering and replaced the TL072 that I had installed in the 071 socket unit is working!!!! I had a feeling that something wasn´t quite right with it soundwise but now it´s behaving much more like I expected it to.

 

[rotation]

Hi!
I hope you guys don't mind answering this question one more time.
After good success and little problems with mass around in/out circuitry on Gyraf's GSSL i'm buying pcb for 1176. I would like to know if all problems with Gyraf's boards for 1176 are now solved.
Thanks in advance!
Miha

 

[gyraf]

The only possible problem is the pcb copper trace you need to cut in order not to risk running into noise-trouble. But that's well-documented.

Jakob E.

 

[rotation]

Aha, thanks for the reply.
Miha

 

[MattiasC]

Mnats specifies a 2.2M carbon resistor for R7 and R9, while Jacob's and Greg's parts lists don't specify metal or carbon. Is there any reason or benefit in using a carbon resistor here?

 

[sintech]

MattiasC,

Any 2m2 resistor will do fine. :thumb:

 

[dissonantstring]

hi MattiasC,
just use whatever you have. generally metal film are used because they have lower tolerances (usually 1%) and are less noisey than carbon film, but it really shouldn't matter in just R7 and R9. Just use which ever is more available to you.
regards,
grant

 

[MattiasC]

:thumb:

 

[stefan]

is there any danger in having the heatsink of the 7825 touching the top plate of the box? I´m building in 1U case and things are getting tight.

 

[sintech]

I'd make sure your 7825 is isolated from the heatsink with a mica washer or similar. Otherwise the centre pin will be shorting to ground.

 

[gyraf]

7824, not 7825..

 

[stefan]

[quote author="gyraf"]7824, not 7825..[/quote]of course it is, my mistake

 

[MattiasC]

I wound up with 10uf/50v caps for the balanced input section rather than the specified 10uf/35v. Will this cause me any grief?

 

[sintech]

MattiasC,

10uf/50v will work fine. :thumb:

 

[MattiasC]

Thanks again, Sintech. I'm a noob, so forgive me if these questions seem redundant.

The potentiometers have a metal tab which I assume is there to attach to the faceplate. Is the only way to attach it to drill a hole? I don't want to risk cutting through the front of the faceplate. What are my options here? I'm about 5 seconds from cutting that sucker off.

 

[khstudio]

[quote author="MattiasC"]Thanks again, Sintech. I'm a noob, so forgive me if these questions seem redundant.

The potentiometers have a metal tab which I assume is there to attach to the faceplate. Is the only way to attach it to drill a hole? I don't want to risk cutting through the front of the faceplate. What are my options here? I'm about 5 seconds from cutting that sucker off.

[/quote]

I cut them off 99% of the time... go for it. Won't hurt a thing. Just tighten the nut as firm as you can so the pot doesn't spin :wink:

Kevin

 

[MattiasC]

Thank you!

 

[MattiasC]

Well, I had mine up and working for a short time. Thanks for all the help here. It definitely added some cool character. Unfortunately, I fried R89 while trying to measure the VU meter voltage. I don't know if the 7824 is cooked as well, but hopefully not. Any advice at this stage?

 

[MattiasC]

Changed the 7824 and r89 and everything is back to normal. Thanks to Sintech, Mnats, Bill Putnam, and especially Jakob for putting it all together.