Oops!

I managed to track down the source of my annoyance
IE a dicky input selector on the amp

So i decided to whip the board out and reflow the solder before buying a replacement (fingers crossed on this, new year = must not spend willy nilly)

When i first got the amp s/h it had those 'orrible BFA sockets so i duely trotted out and obtained some normal type posts, wich i fitted.
Well to get the board out i need to remove the posts as the hold the heatsink to rear of amp.
Guess what numpty here did when he fitted the posts...........
I managed to cover the threads with solder
I've tried the sucker and the braid but nadda.

Not got a thread die to suit, so while im off beating myself with a big stick can anyone suggest a method of removal??

Also had a look at the op-amps, OPA604AP, any point replaceing them if i ever manage to remove the board?

 

why not try putting another nut on

 

Cause i wanna take em off

I think your meaning to clean the threads?

Im going to have a look in work for a die tomorrow, failing that another nut or hacksaw

 

you got it

 

Technically the 604s are fine op amps. They're not the nastiest of cheap by any means (the dual version, 2604 is about £2.50). However, you can always have a play with replacing them. AD825s are always popular. Otherwise go up in the burr brown range to the 627. Otherwise, I'm sure WM can advise on more esoteric ADs.

 

Thanks isaac
would i need to play with anything else? or a direct swap?

 

The 604AP is a DIP8 package, so the 627 would be a straight swap. The AD825 comes only as an SMD8A, so you'll need some converter modules, or get good with your soldering.

 

do you know anything about the AD8065?
Seems very good on paper but i can only find reports of its use in CDp/DAC, but apparently is a good replacement for the 604

 

Too good for you voltage probs with this one +/-13V max, the 604 isn't a bad opamp, the 627's are very 'nice' and full bodied, good texture, for me misiing top & bottom a bit, 8610's are also very good, 825's are very good too, depends on the sound your after, but remeber most now come in the smaller pacakes, and you will need to use a discreet mount device as well, some times removing, the old op-amps can be trouble especialy on decent cuicrit boards, 4 layer or more, a vacum desoldering tool is almost a must, else track repairs will be your staple diet Andy you may also need extra decoupling too. Wm

 

yer, before anything i need to measure voltage (pin 4 and 8 i think)
LCaudio do the 8065 on a DIP package with decoupling caps fitted already.
Hopefully i can use the smt desolder station at work, dont want track repair

Soudwise, i guess im just after a tad more dynamics and oomph

 

Tone
how would you describe the character of the 8610/825 (if they are similar)?

 

My post has disappeared again !!

Damn damn damn

I said the 604 is pretty good for the cost ...you can better it by paying loads more!

use solder wick to remove the over solder.

 

Hi Pete

Tried solder wick, wouldnt get it out of the threads

 

Andy, I ordered 100 of the 8065 still bloody waiting the 8610, is a cross between the 627 & 825, it's good, I prefer 825's for some things 8066's for others, the 65's are the singles, they newer op-amps are much quieter, but haven't got the voltage range the others have, plus you will need better regulation (IMHO) to get the best out of them, also some pre's & int's don't always respond to 'by the numbers upgrades', it's the whole package, no just any one item. Tone

 

Tone, i see what you mean ubout it maybe not achieving anything, but at the small cost.............

 

Just out of interest, what are LC selling the mounted packages for Andy?

 

Tone
18.90 for single
28.40 for double

http://www.lcaudio.dk/com/ad8065.htm

 

Bags of doubles, no bloody singles, thats a fair price too for the punters

 

yer, thought it wasnt a bad price, around 40quid for me lil ole shearne
may give it a shot, after further deliberation

 

I've got AD825's in the Wadia 15, they are the sonic equivalent of a fairly large hammer , perhaps a bit of a shock for a Shearne

I love 'em though.

Cheers