Search found 8 matches

by Ruptor
Fri Nov 16, 2018 9:39 am
Forum: Serial Numbers
Topic: Orange Model RO 100? Serial Number 752
Replies: 18
Views: 6588

Re: Orange Model RO 100? Serial Number 752

It looks like a prototype unit to me and been built by someone dyslexic. Not only is the OR round the wrong way but the hand written PRES has the S back to front. Having been a design engineer building prototype medical electrical equipment for most of my life you use what you have like a chassis of...
by Ruptor
Wed Jan 04, 2017 11:59 am
Forum: Community Discussion
Topic: OR100 for nothing almost
Replies: 9
Views: 1905

Re: OR100 for nothing almost

I nearly strained my bad back lifting the Matamp on top of the freezer so I could take a photo. Here is the box http://photobucket.com/user/Ruptor/media/OR100_zpsy0glijj4.jpg.html" onclick="window.open(this.href);return false; Looking at the photo I realised someone stuck a Union Jack on the front a...
by Ruptor
Tue Jan 03, 2017 7:49 pm
Forum: Community Discussion
Topic: OR100 for nothing almost
Replies: 9
Views: 1905

Re: OR100 for nothing almost

ironlung40 wrote:I am ignoring this thread.
Oh no you are not. :lol: Well this is the pantomime season. :lol:
by Ruptor
Tue Jan 03, 2017 7:04 pm
Forum: Technical
Topic: Micro Dark Head 2x PPC108 cabs
Replies: 5
Views: 2098

Re: Micro Dark Head 2x PPC108 cabs

Also doubling the output impedance doesn't reduce the output power by 4 times. It will roughly halve it. Similarly halving the output impedance won't increase the power by 4 times. It will roughly double it. Yes you are right I forgot the impedance is half or double that opposes the increased curre...
by Ruptor
Tue Jan 03, 2017 3:36 pm
Forum: Community Discussion
Topic: OR100 for nothing almost
Replies: 9
Views: 1905

Re: OR100 for nothing almost

Just to rub salt in the wound of the bargain the Matamp has its original Mullard british made valves but is there any real difference between the valves? A long time ago I bought 4xEL34 valves made in GDR for £6 to build an AC30 circuit but I never got round to it because the transformers were very ...
by Ruptor
Tue Jan 03, 2017 12:14 am
Forum: Community Discussion
Topic: OR100 for nothing almost
Replies: 9
Views: 1905

OR100 for nothing almost

I am about to make you all sick because I was given an original OR100 Orange Matamp but it wasn't working. I fixed a guys Vox AC30 that was dead and he gave me the OR100. Your going to get even more sick now because his mate didn't want a 4 speaker Orange unit that they used with the amp in their ba...
by Ruptor
Mon Jan 02, 2017 9:39 am
Forum: Technical
Topic: Micro Dark Head 2x PPC108 cabs
Replies: 5
Views: 2098

Re: Micro Dark Head 2x PPC108 cabs

IF it is this combo https://www.amazon.com/Orange-Micro-Hybrid-PPC108-Cabinet/dp/B0161KSGSU" onclick="window.open(this.href);return false; then the amplifier is designed for one speaker not two. The amplifier has a minimum 8R output impedance and the speaker has 8R input impedance so they are matche...
by Ruptor
Sun Jan 01, 2017 8:57 pm
Forum: Serial Numbers
Topic: My Orange Matamp OR100 is back home
Replies: 5
Views: 9048

Re: My Orange Matamp OR100 is back home

Can someone point me to a schematic of the OR100 like this one? Since Bendyha on this thread said he would like to draw one I guess it didn't exist two years ago but does it exist now?