Search found 596 matches
- Thu Jul 27, 2023 10:41 am
- Forum: DIY - BUILD YOUR OWN Amps
- Topic: Calculating slotted port size in 2x12?
- Replies: 22
- Views: 8899
Re: Calculating slotted port size in 2x12?
in a sealed Cab you can reduce the internal volume (with a partition, or fit another sealed box inside to take up space?) to reduce bass response. Bricks not a good idea Polystyrene Should work but I have not tried it. Smaller Cab (Sealed) gives back pressure to the cone, damping excursion. Strange,...
- Tue Jul 25, 2023 3:54 pm
- Forum: DIY - BUILD YOUR OWN Amps
- Topic: Calculating slotted port size in 2x12?
- Replies: 22
- Views: 8899
Re: Calculating slotted port size in 2x12?
Just thought I should mention The boundary effect. The placement of speakers or open back combo Amps when setting up a stage can drastically improve loudness. If a speaker is placed against a wall (pointing outwards of course), Theoretically you will get a 3dB increase in SPL. (twice as loud) Applie...
- Sun Jul 23, 2023 2:51 pm
- Forum: DIY - BUILD YOUR OWN Amps
- Topic: Calculating slotted port size in 2x12?
- Replies: 22
- Views: 8899
Re: Calculating slotted port size in 2x12?
http://www.troelsgravesen.dk/BOX-PORT-CALC.htm Thanks for the link, read it through twice, bit over my head though. Still unsure how I would calculate the port length if it’s cut out of the bottom of the cab? For a rectangular port the length remains the same. Take the diameter of round port and ca...
- Mon Jul 17, 2023 12:17 pm
- Forum: Artists
- Topic: John Hanlon First Video ever?
- Replies: 2
- Views: 1942
- Thu Jul 13, 2023 1:34 pm
- Forum: DIY - BUILD YOUR OWN Amps
- Topic: Anvil Amps now in Paeroa
- Replies: 13
- Views: 7958
- Thu Jul 13, 2023 9:51 am
- Forum: DIY - BUILD YOUR OWN Amps
- Topic: Anvil Amps now in Paeroa
- Replies: 13
- Views: 7958
Re: Anvil Amps now in Paeroa
That sign is about 20 years old, Made it when I was doing Car Audio & Alarms for people who wanted to sit in the back seat of their car and watch over my shoulder, one old guy who thought it acceptable for his small dog trying to lick my face while I was working in the front on the stereo instal...
- Thu Jul 13, 2023 9:27 am
- Forum: DIY - BUILD YOUR OWN Amps
- Topic: Anvil Amps now in Paeroa
- Replies: 13
- Views: 7958
Re: Anvil Amps now in Paeroa
Not yet.
There are a few people in the wings with Amps to Doctor.
There are a few people in the wings with Amps to Doctor.
- Thu Jul 13, 2023 9:14 am
- Forum: DIY - BUILD YOUR OWN Amps
- Topic: Anvil Amps now in Paeroa
- Replies: 13
- Views: 7958
Anvil Amps now in Paeroa
Hi all,
Just a heads up for Valve Amp owners in the Waikato area.
I have moved away from all the traffic jams and set up my Repair Workshop in Paeroa.
Still setting up and things are a bit of a mess, but I have done a couple of repairs already.
Just a heads up for Valve Amp owners in the Waikato area.
I have moved away from all the traffic jams and set up my Repair Workshop in Paeroa.
Still setting up and things are a bit of a mess, but I have done a couple of repairs already.
- Mon Mar 20, 2023 12:03 pm
- Forum: DIY - BUILD YOUR OWN Amps
- Topic: MikeC Sixty-One SRT
- Replies: 123
- Views: 210026
Re: MikeC Sixty-One SRT
You could try larger grid resistors on the EL84s too. Never heard of the cathode zener trick - interesting idea. Fender Bassbreaker 15 has Zeners which always go short circuit and cook the output bottles. I have removed them on 2 amps now. They C*#ts of amps to work on but you can clip the diode le...
- Sun Mar 12, 2023 7:45 am
- Forum: DIY - BUILD YOUR OWN Amps
- Topic: Rockit Super Lead 130 (Mk6) - Lead Channel
- Replies: 7
- Views: 3359
Re: Rockit Super Lead 130 (Mk6) - Lead Channel
Because Anil opted to mount the components on the solder side any tech would find that section easy to read like a schematic. I knew Him back then. I would offer to help but I am presently moving to Paeroa. I am sure Clarry Schollum or Mark Maloney could sort it for you. The first thing I would repl...
- Sat Oct 15, 2022 10:25 am
- Forum: Amp Talk
- Topic: Jansen 12 Sixty head repair
- Replies: 13
- Views: 1972
Re: Jansen 12 Sixty head repair
I am currently working on a 12 100 which has been seriously molested internally.
Do you have any more gunshots of your chassis which you could share?
Do you have any more gunshots of your chassis which you could share?
- Thu Oct 13, 2022 1:01 pm
- Forum: DIY - BUILD YOUR OWN Amps
- Topic: Eyelet board question
- Replies: 16
- Views: 3870
Re: Eyelet board question
I prefer to use Turrets instead of Eyelets, Made a replacement board for a Fender Twin a while back, dimensions can be the same but made of 3mm turret material.
Re: Engl Amp?
Engl are almost impossible to repair because the stacked PCBs make them nightmarish.
I won't touch them and I don't think Clarry will either.
I won't touch them and I don't think Clarry will either.
- Sat Jun 11, 2022 11:18 am
- Forum: Amp Talk
- Topic: The Impedance Question
- Replies: 19
- Views: 2299
Re: The Impedance Question
I have Resistance to Impede the Reactance here, also the Reluctance to mention the speaker coil back EMF?
- Wed Apr 06, 2022 9:39 am
- Forum: Amp Talk
- Topic: NAD - Jansen Bassman
- Replies: 30
- Views: 4654
Re: NAD - Jansen Bassman
Bias rectifiersizzlingbadger wrote: ↑Tue Apr 05, 2022 6:22 pm I wonder what that little signal diode is in there is for.