525 build thread

[Greg]

I order my LM3914s from some dood on e-bay. Couldn't find them at Mouser or Digikey.

 

[RedNoise]

thx greg , I'll investigate!!
Cheers!!

 

[Siegfried Meier]

How easy is it to adapt the original 525 GR meter into this circuit?  What needs to be done?

Does anyone have any leads on where one can get this meter?

Thanks!
Sig

 

[peter purpose]

What needs to be done?

Leave out the meter/pot pcb and connect your rare as rocking horse poo meter to the hole marked 12.

 

[Siegfried Meier]

Just to hole 12?  And ground, I assume.

Are there any other meters that can be used?  I don't suppose API would sell these meters from their new reissue units...

Thanks!
Sig

 

[Siegfried Meier]

What about all the other stuff that exists on the meter board?  R/ATT, Mono Strap etc. - where does this stuff now connect to if I use the other meter?

Thanks,
Sig

 

[Denyle Guitars]

Solder pad 15 on the meter board goes where?

 

[peter purpose]

Solder pad 15 on the meter board goes where?

Page 10 of this thread.

 

[Denyle Guitars]

Thanks.

 

[gar381]

gar381's version of peter's wonderful 525.

Much still to do.

GARY

 

[RedNoise]

Hey Gar381...It's a Grayhill??

 

[peter purpose]

V nice Gary... you could have asked for the drawings ya know..!!

Here's a little mod for the meter signal. As is, the meter still operates in bypass, so why not use the spare side to switch the signal in and out.

 

[gar381]

V nice Gary... you could have asked for the drawings ya know..!!

Thanks peter.  I will remember that next time but I actually had a great time backwards
engineering your metal work.  Fun project !!

Hey Gar381...It's a Grayhill??

Yha Rednoise its a Grayhill and e-switch replacements for the wellbuying.

GARY

 

[bradb]

How is this project going?

Are boards / kits / trannies still available?  I know I'm late to the party?

Any bummers or un-sussed problems still lurking?

thanks, looks totally awesome.

 

[okgb]

Hey brad  , i believe Baltimore was selling a couple kits

Peter , i'm not in a hurry but curious to lnow  , did the fixed metalwork
kits ship out ? [ haven't seen mine ]

 

[Siegfried Meier]

Hey Peter,

Is the front panel supposed to sit tight against the chassis?  I suppose it can't, since the nuts from the pots is there.  What holds the panel in place, the Sifam knobs?

EDIT - or, the nuts are supposed to go on the actual front panel, not on the aluminum sub panel...?

Sig

 

[peter purpose]

The youth of today, eh!

 

[Siegfried Meier]

I guess that more or less answers my question, and thank you for calling me youth.  Makes me feel good.  You old bastard. 

Sig

 

[wowi]

Hi Peter,

i nearly finished this project. Thank you for this wonderful compressor.

I am not sure about the attack mod. You send me the 100k pot for the attack pot.
Is the attack mod still necessary ?

If yes, is this approach from greg ok:

1. Connected C3 across wiper and ground (you can see the WIMA on top the meter board).
2. Cut two traces... one on the underside of the meter board that connects the wiper to the end contact. The other on the top that connects the wiper to ATT.
3. Added a wire from the contact that was connected to the wiper to ATT.

You wrote something about changing cap size to 330nF. Do you still recommend this ?

regards
Wolfgang

 

[peter purpose]

Do you still recommend this ?
I haven't tried it. Why don't you... and report back.