Help me fix my Lindsley Hood mono

[rocky raccoon]

Chaps
take a look at the photo ;
cap & resistor picture by bloodyhell451 - Photobucket

Zoom in on the magenta circle - see the (100 pf ?) cap ? Is it a 100 pf cap ?
What's that there resistor what appears to have melted the cap ?

Some help please !

Very best regards,

rr

[pilli]

Originally Posted by rocky raccoon

Is it a 100 pf cap ?
What's that there resistor what appears to have melted the cap ?
Some help please !

...well, the picture isn't very clear.
Those are styroflex caps, the values cannot be read clearly.
You can tell us the markings.
Those caps often have that bubbly shape.
Is the resistor melted? or is the cap melted?
Is the amplifier not working?


_

[rocky raccoon]

Strange. I can blow it up 'till the resistor is 20 cm wide on the screen.
I can tell you that the value on the cap is 100. Does this mean that the cap is 100 pf or does this mean that the first figure is one, the second figure is 0 and 0 is the multimplier (meaning 10 pf) ?

For the resistor, the bands at either end are brown, then the 3 in the middle are red black black (or black black red).
So is it a 120 ohm or a 10 K resistor ?

Any help much appreciated.

[anthony.taylor1967]

Yes it means 100 pico F

[rtirion]

10k and 100pF

[anthony.taylor1967]

Rocky, when was your amplifier published, I have seen 2 versions of the 80w mosfet amp but both so not look like yours.

If you are uncertain of the coolours try measuring it in circuit or lift one leg out and measure it, but it seems to look fine, It might be due to overheating during soldering.

Did you get your schematic I sent you?

I hope this helps you

Regards - Anthony

[p robertson]

i have this version of the amp and can confirm the values are 100pf and 10k.they are part of a balanced to unbalance input.

[rocky raccoon]

Originally Posted by p robertson

i have this version of the amp and can confirm the values are 100pf and 10k.they are part of a balanced to unbalance input.

Dear P
do you have the parts list and numbers for your amp ? I would kill to get a copy (scan - bloodyhell451@yahoo.fr or whatever - fax is 0033 559 51 42 95)
I wonder if the cap & resistor are relevant as I use unbalanced inputs.

The amp has been in service for several years and went into red mode the other night.

Maybe I'll have to look elsewhere - but I will start by replacing those anyway.

Many thanks for your help and, if you could get the list - that would be fantastic.

Best regards,

rr

[Bigun]

it's hard to see from the photo, but it does look as if the resistor has melted the cap - there's 'goo' on the resistor lead.

[trevamp]

These type of caps often have a melted apearence. A 10k resistor would need at least 100V across it to get that hot?