Search found 1340 matches

by 94Tremoverb
Thu Mar 08, 2012 7:27 pm
Forum: Rectifier Series
Topic: Where's the thread for ok cathode follower preamp tubes?
Replies: 3
Views: 786

Re: Where's the thread for ok cathode follower preamp tubes?

Just avoid anything Russian. Even the standard Chinese ones are fine, you don't have to use something expensive - although all old-production types are OK as well.
by 94Tremoverb
Thu Mar 08, 2012 7:24 pm
Forum: Rectifier Series
Topic: blue angel pop when taken off standby
Replies: 5
Views: 635

Re: blue angel pop when taken off standby

Be aware that there is a highly unusual design quirk of this amp regarding V1. The second half of the tube is configured as a cathode follower - it's not actually used in the circuit, my guess is that it's a left-over design element that was put in during prototyping but used not in the production a...
by 94Tremoverb
Wed Mar 07, 2012 4:01 pm
Forum: Rectifier Series
Topic: Tremoverb, DR & Mark Series Design Flaws??????
Replies: 15
Views: 1601

Re: Tremoverb, DR & Mark Series Design Flaws??????

It's just that this is all new to me and I don't want to experience the nightmare that this tech described. Catastrophic, actually. What exactly did he describe? I've never seen a Mesa amp with a catastrophic failure, and I would think it was unlikely it would happen unless the amp was deliberately...
by 94Tremoverb
Wed Mar 07, 2012 12:38 pm
Forum: Rectifier Series
Topic: Tremoverb, DR & Mark Series Design Flaws??????
Replies: 15
Views: 1601

Re: Tremoverb, DR & Mark Series Design Flaws??????

Tube failures can occasionally blow screen resistors. Mesa is less than ideal on this because they use carbon screen resistors which do have more of a tendency to burn out than wirewounds, as some other manufacturers use. They also do not use HT fusing which some other companies do, so the amp will ...
by 94Tremoverb
Sat Mar 03, 2012 2:04 pm
Forum: Modern Era Amps (1991-Present)
Topic: Good Mesa Boogie for grunge and hard rock from the 90s?
Replies: 11
Views: 1437

Re: Good Mesa Boogie for grunge and hard rock from the 90s?

A Dual Caliber DC-5 or DC-10 will nail the 90s grunge/hard rock sound. They're much more midrange-focused than the Rectos and more aggressive and direct than the Marks. They're also simple to operate and cheap.
by 94Tremoverb
Sat Mar 03, 2012 2:00 pm
Forum: Modern Era Amps (1991-Present)
Topic: Secret Variable NFB control on Mesa Amps
Replies: 4
Views: 955

Re: Secret Variable NFB control on Mesa Amps

It won't do anything detectable - even in those amps with the Slave driven from the same OT tap as the NFB. At best, even with a shorted plug in the Slave jack and the control maxed, you're shorting the NFB loop to ground via a 10K resistor (in the Heartbreaker, maybe different in other models but i...
by 94Tremoverb
Fri Feb 24, 2012 8:19 am
Forum: Modern Era Amps (1991-Present)
Topic: Trem-o-verb or Mark V
Replies: 13
Views: 2302

Re: Trem-o-verb or Mark V

It really is an each to their own thing. (Although there are certainly people who like both.) Me, I've never got on with any Mark series Boogie I've ever played, and I only owned one very briefly, which was an extremely frustrating experience. I thought I just hated Mesa/Boogies, and so it took me y...
by 94Tremoverb
Thu Feb 23, 2012 1:55 pm
Forum: Tubes
Topic: JJ 12ax7s Anyone getting a honky tone?
Replies: 5
Views: 2209

Re: JJ 12ax7s Anyone getting a honky tone?

I strongly dislike JJ 12AX7/ECC83s - possibly the most of any 12AX7. They sound overly middly, both muddy and harsh at the same time. Nasal or honky also would describe it.
by 94Tremoverb
Mon Feb 13, 2012 3:18 am
Forum: Modern Era Amps (1991-Present)
Topic: Importing Mark V US into UK
Replies: 9
Views: 1337

Re: Importing Mark V US into UK

You don't need an isolation transformer, an auto is fine. You also don't strictly need 1KW, 500W is enough - although more doesn't hurt. If you want a 240V transformer for the amp, you need to look at other sources than Mesa. They deliberately keep the prices high in order to discourage importing li...
by 94Tremoverb
Mon Feb 13, 2012 3:13 am
Forum: Rectifier Series
Topic: Trem-o-verb Red Channel cuts in and out (drops gain) sounds
Replies: 3
Views: 671

Re: Trem-o-verb Red Channel cuts in and out (drops gain) sounds

The Rectoverb is different because it has two separate signal paths for the channels, so a problem with V3 only affects the lead channel. In the Tremoverb, all the tubes are used on both channels, it's just the control networks that are switched.
by 94Tremoverb
Thu Feb 09, 2012 6:35 pm
Forum: Rectifier Series
Topic: Trem-o-verb Red Channel cuts in and out (drops gain) sounds
Replies: 3
Views: 671

Re: Trem-o-verb Red Channel cuts in and out (drops gain) sounds

Probably an LDR (channel-switching component) - this is a very common problem with the Tremoverb. If the gain drops, it will be one very early in the circuit, probably LDR1 or LDR8. Changing them is a job for a tech, or back to Mesa for a full overhaul if you're in North America - they will change a...
by 94Tremoverb
Mon Feb 06, 2012 1:30 pm
Forum: Modern Era Amps (1991-Present)
Topic: What Construction Technique on Mesa Cabs/Shells
Replies: 6
Views: 950

Re: What Construction Technique on Mesa Cabs/Shells

In the video no they dont show the exact method of them putting together the cabs but if you pay close attention you will see the straight seams of where the top and bottoms of the cab look to be like caps over the sides. There is no evidence of either finger or dove tail joints. That's what I thou...
by 94Tremoverb
Sat Feb 04, 2012 12:23 pm
Forum: Modern Era Amps (1991-Present)
Topic: What Construction Technique on Mesa Cabs/Shells
Replies: 6
Views: 950

Re: What Construction Technique on Mesa Cabs/Shells

What I can say is that dovetailing is not all its cracked up to be. My marshall cab with the back off of it is far less stable than my boogie. Marshall cabs aren't dovetailed - they're finger-jointed, which is similar, but quite a bit different. The rigidity of the cab is more determined by the thi...
by 94Tremoverb
Tue Jan 31, 2012 4:59 am
Forum: Modern Era Amps (1991-Present)
Topic: Anyone ever try a v30 speaker in a DC-5 Combo?
Replies: 2
Views: 410

Re: Anyone ever try a v30 speaker in a DC-5 Combo?

If you need to cut the mids to stop it sounding harsh with the C90 it will be even worse with the V30.

The huge mid hump is what made me move on from my DC-5 eventually...
by 94Tremoverb
Mon Jan 30, 2012 3:58 pm
Forum: Rectifier Series
Topic: Bold/Spongy voltages
Replies: 4
Views: 819

Re: Bold/Spongy voltages

That's correct. (84%)

Here are the power tube plate voltages from my Tremoverb:

Diode/Bold: 440
Tube/Bold: 420
Diode/Spongy: 370
Tube/Spongy: 355

The bias voltages will fall by the same amount. (Not quite relevant to measure mine since it has a bias adjustment.)