umph

[quote name='Geddys nose' timestamp='1333607240' post='1604054'] Very easy to re valve actually I always do my own with a Eurotube kit, it's a fixed bias so there's nothing to adjust. I'd say £800 a pretty good price for one,great amp BTW. [/quote] It's non adjustable fixed bias, which is bad. you need to make sure the valves are well matched which they pretty much aren't gonna be if you get them from somewhere like that.

looks like one of the mail order kits

i like the shuguangs, not happy with jj's strange you had problems with the ehx 6ca7's been running the ones in my roost for about 3 years now

hey al would you sell any of the small clone pcbs?

[quote name='Mr. Foxen' timestamp='1333111436' post='1597570'] If it has to be serviced/revalved every year, something is wrong. [/quote] or your tech is making a killing on replacement valves

[quote name='razze06' timestamp='1333099779' post='1597265'] I've tried the amp again at home last night. The pre doesn't clip almost at all, and the sound is clean(ish) all the way to max gain in the pre. That is with very low volume from the power stage, haven't tested the overall effect yet. Interestingly enough, we tried bridging the inputs like to engage all channels, and we could hear a weird and interesting tremolo/flanging effect on the signal The amp almost certainly has parts that started life as PCB bits from a kit, but there is plenty of signs of modification on the PCBs themselves. It is quite likely that it has been modded to alter the tone to suit a certain style of guitar playing. I had to ask the tech to stop working on it, as I wanted to make a decision about what to do with it. I still haven't... The options I have are:[list] [*]Sell it as is, for around £200. Probably more appealing as a guitar amp, but the current tone is very nice for bass too. Tempting, but a bit of a wasted opportunity, as Mr Foxen says [*]Sell the components separately. Original Fender OPTs from 1973 should fetch a fair bit of money, maybe £300/£350 for the lot? Does anyone else think that is close to murder ? [*]Rip out the existing preamp, and have it rebuilt as a proper bassman pre (or even a fender twin pre) using as many of the existing bits as possible. [*]Bypass the preamp, and use it as a valve power amp with another pre [*]Keep it as is. [/list] What would you do? [/quote] the trem effect is the amp going into oscillation. personally i'd redo the pre, since you'll be lucky to get 200 for it and the transformers aren't really gonna be worth as much as you think they are.

the preamp would have to be really badly designed to clip that early. Also the tech could've dropped some lower mu valves in the pre? I just think he was being lazy.

40w clean sounds really bad. theres no way you'd only get that much in fixed bias without there being problems elsewhere

i've built 6 other ones before this, this one should just be the end one i'm happy with

[quote name='EdwardHimself' timestamp='1330942023' post='1564920'] Give him a chance, lad. He's from yorkshire! probably just having a bit of a sit down for a brew before getting on with the rest of the build [/quote] haha very much been doing this. Also absolutely skint atm which means i'm having to get on with the jobs that make the money - urgh

[quote name='JimBobTTD' timestamp='1330242714' post='1554414'] They do not tend to explode. They sound good, but I think there are better amps out there. I had a Blues Jr for a few years and it was great. I currently have a Marshall JCM800 combo and a power brake to quieten it down a touch. [/quote] i've had to fix alot of them, they bias the output valves far to high and the speaker isn't really up to the job

avoid the blues juniors they tend to explode

get a guitar amp for the bridge, put it on full

model T(doom))))

[quote name='the_brow' timestamp='1329480721' post='1543061'] Owned a 400+, nothing like the GT200. The GT200 is cleaner,especially the pre, more mids and less highs. The boogie sounds good clean, but I did not like the way it distorts. It also has a very hard feel, and seems to lack responsivenness when compared to the GT200. The GT200 is more pillowy and seems to have more sag than the 400+. To me the 400+ and Bassman 300 PRO are very solid state sounding tube amps. [/quote] haha very strange you'd say that about the 400+ alot of its make up is very traditional valve amp. @kiwi transformers work or they don't, the ones in the 400+ don't go all that low.

[quote name='Kiwi' timestamp='1329372737' post='1541347'] If I wanted clean power, I'd get a Boogie 400+. Best valve amp I've ever owned and built like a nuclear bunker. I worry about valve amps getting too hot - not a problem with the fans in the Boogie. [/quote] 80watts more isn't that much of a huge leap. Never been to impressed with the low end of the 400+ either

[quote name='Mr. Foxen' timestamp='1328951321' post='1535128'] Do you mean long plate rather than long pin? Pins have to be consistent to be compatible. Long plate is better for tone mojo, short plate is less microphonic so better in practice. Most of the difference is down to seeing the tone. I've had people demand to know details to they can tell how it sounds in favour of actual recordings. [/quote] longer plates = better current handling = less harsh break up = moer awesome = more doom

[quote name='the_brow' timestamp='1329347322' post='1541234'] thunder tank! [/quote] thunder doom tank