Search found 104 matches

by LD50
Thu Dec 26, 2019 6:20 pm
Forum: Community Discussion
Topic: Which Celestion G12H in a PPC212?
Replies: 4
Views: 1038

Re: Which Celestion Heritage G12H in a PPC212?

Personally speaking I would go for the mix. You will find some boutique amp/builders go further and mix an H and an M in the same cab but I have not done this myself as they have quite different sensitivities (100dB and 96dB respectively). You could also consider the Creambacks, if I were considerin...
by LD50
Thu Dec 26, 2019 6:05 pm
Forum: Community Discussion
Topic: OR-80 Overdrive vs OR-120 tone and volume differences?
Replies: 15
Views: 2705

Re: OR-80 Overdrive vs OR-120 tone and volume differences?

Can't say I'm an expert in electrolytic capacitor brands, but they don't look that new and they should probably be replaced after 25 years. Someone else may have a better idea, seems like that company is still in business, but I couldn't find that they still make electrolytic caps. The amp will sti...
by LD50
Thu Dec 26, 2019 3:54 pm
Forum: Community Discussion
Topic: Which Celestion G12H in a PPC212?
Replies: 4
Views: 1038

Re: Which Celestion Heritage G12H in a PPC212?

The Anniversaries have their devotees but my experience was not to my taste. I had a G12H30 55Hz quad in a Marshall TV cab and they took a long time to break in (to put this into perspective I have two 70s Orange 4x12s and three Marshall 4x12s. Two cabs have the Hs with T1217 (75Hz speakers) one has...
by LD50
Sat Dec 21, 2019 2:38 pm
Forum: Community Discussion
Topic: OR-80 Overdrive vs OR-120 tone and volume differences?
Replies: 15
Views: 2705

Re: OR-80 Overdrive vs OR-120 tone and volume differences?

Looking at your amp it looks pretty clean, the wiring has been nudged around a little, can't tell why. The PI output couplers on these are normally 0.068uF, there are two pairs two for the cathode side and two for the anode side from the PI either side of the MV dual 1M pot. On yours the caps closes...
by LD50
Thu Dec 19, 2019 10:05 pm
Forum: Community Discussion
Topic: OR-80 Overdrive vs OR-120 tone and volume differences?
Replies: 15
Views: 2705

Re: OR-80 Overdrive vs OR-120 tone and volume differences?

Please post some internal pictures (Hi res if possible) of your amp.
Pay attention to the board and the controls (ie pots and FAC switch).
It may have been messed with and we can point you in right direction of getting the original tone you seek.
by LD50
Wed Dec 11, 2019 7:46 am
Forum: Community Discussion
Topic: OR-80 Overdrive vs OR-120 tone and volume differences?
Replies: 15
Views: 2705

Re: OR-80 Overdrive vs OR-120 tone and volume differences?

The circuits of post 73 OR120s and the 80 overdrives are not that different, the MV in the circuit is not the purest type and will always give a little grit and distortion. Personally I would also advise your friend not to pull output tubes on a healthy OR120 (the volume drop is minimal, the cab opt...
by LD50
Sun Dec 01, 2019 8:53 am
Forum: Technical
Topic: OR120 mod
Replies: 25
Views: 10684

Re: OR120 mod

by LD50
Fri Nov 22, 2019 6:54 pm
Forum: Serial Numbers
Topic: 1970 ORST Unhack
Replies: 6
Views: 4279

Re: 1970 ORST Unhack

The stage/studio Drive switch is interesting. The studio has two settings, hard left has the Depth switch in circuit. The second position has the depth switch with a 150pF bypass cap across the volume pot. Position three bypasses the Depth switch and position four is the same but with the 150pF ‘bri...
by LD50
Mon Nov 18, 2019 11:39 pm
Forum: Technical
Topic: OR120 mod
Replies: 25
Views: 10684

Re: OR120 mod

The black Matamps were the GT100s
A friend in Canada put us in touch and I've worked on a few things for him since.
Yes he lives in the US but tours the UK and Europe pretty constantly.
I have schems for most Oranges and the early Matamps.
by LD50
Sun Nov 17, 2019 9:32 pm
Forum: Community Discussion
Topic: ALL GOOD THINGS....
Replies: 50
Views: 16514

Re: ALL GOOD THINGS....

So long......and thanks for all the fish 8)
by LD50
Sun Nov 17, 2019 5:00 pm
Forum: Technical
Topic: OR120 mod
Replies: 25
Views: 10684

Re: OR120 mod

Hi Angelo Funnily enough I have recently been working on Andy's amps. At present he has two 1970 OR100s on tour with him, he is using the original that he bought new in Denmark St (stolen and later returned) and another that Mark is using. I have also just restored an ORST (50w), that is in the unha...
by LD50
Sun Nov 10, 2019 7:06 pm
Forum: Technical
Topic: OR120 mod
Replies: 25
Views: 10684

Re: OR120 mod

Old thread but well worth the discussion :) Some points though. I agree that using a 220k to ground as a voltage divider on the grids is a way of attenuating signal and it was not used on the early Matamps, or the OR series of Orange/Matamps it was used on the Matamp GT100 in the early 70s (which al...
by LD50
Mon Nov 04, 2019 9:57 pm
Forum: Community Discussion
Topic: Do you want to cry a little????
Replies: 9
Views: 3884

Re: Do you want to cry a little????

Well I bid what I thought it was worth bearing in mind have the stuff to restore properly

It went for £735 !!! With no board, transformers, choke, sockets or correct pots :roll:

Hope it does the quality restoration for someone
by LD50
Fri Oct 25, 2019 8:30 pm
Forum: Community Discussion
Topic: Do you want to cry a little????
Replies: 9
Views: 3884

Re: Do you want to cry a little????

Ironically I have all the bits to convert it back, just sad to see.

Price is climbing to a financially non-viable level, but you never know!
by LD50
Fri Oct 25, 2019 8:24 pm
Forum: Community Discussion
Topic: Orange amp problems
Replies: 2
Views: 674

Re: Orange amp problems

The suggestion by Mr Mustard is a good one. Intermittent faults are a pain. Typically open the amp up (taking all the usual precautions re live wires, charged filter caps etc) set it some where safe and stable and play it (or get someone else to) whilst you use a chopstick (non-conductive and severa...