View unanswered posts | View active topics It is currently Mon Dec 11, 2017 12:10 am



Reply to topic  [ 24 posts ]  Go to page 1, 2  Next
 First time buying amp issues 
Author Message
Viking Kong
User avatar

Joined: Sat Jan 13, 2007 7:37 pm
Posts: 5165
Location: London
Post First time buying amp issues
Coulda got this Laney VC30.


Listing has ended. Why don't I have it? My workplace has screwed up sending my first paycheck and it's been delayed. My first real amp has just taken a step further away from me :x

_________________
Thanks MDucran


Fri Nov 26, 2010 6:56 pm
Profile
Dr. X

Joined: Sat Nov 29, 2008 1:26 pm
Posts: 242
Post Re: FML. My life is ruined.
Image

:D


Fri Nov 26, 2010 8:41 pm
Profile
Superhero
User avatar

Joined: Wed Sep 03, 2008 4:00 pm
Posts: 1654
Location: London UK
Post Re: FML. My life is ruined.
Mate, I saw a VC50 (Much better amp) for £200 on jemsite!

Let me look for you now

_________________
[img]http://img32.imageshack.us/img32/6089/rib768.gif[/img] [img]http://i40.tinypic.com/19nrrr.gif[/img]

PGM301
Laney GH100L > Orange 2x12


Fri Nov 26, 2010 9:22 pm
Profile
Superhero
User avatar

Joined: Wed Sep 03, 2008 4:00 pm
Posts: 1654
Location: London UK
Post Re: FML. My life is ruined.
Here you go.

Buy!

Amazing amp

http://www.jemsite.com/forums/f28/fs-uk ... light=vc50

it has a pre-amp feature on the back too which really pushes the vales at low volumes - much like a built in attenuator.

_________________
[img]http://img32.imageshack.us/img32/6089/rib768.gif[/img] [img]http://i40.tinypic.com/19nrrr.gif[/img]

PGM301
Laney GH100L > Orange 2x12


Fri Nov 26, 2010 9:25 pm
Profile
Viking Kong
User avatar

Joined: Sat Jan 13, 2007 7:37 pm
Posts: 5165
Location: London
Post Re: FML. My life is ruined.
I'm in love again.

Also I lol'd at the drama queen picture. I honestly thought I couldn't find a similar deal. Will the VC50 self attenuate enough for a room when at practising levels?

Thanks Anthony, great help! :)

_________________
Thanks MDucran


Fri Nov 26, 2010 11:24 pm
Profile
Superhero
User avatar

Joined: Wed Sep 03, 2008 4:00 pm
Posts: 1654
Location: London UK
Post Re: FML. My life is ruined.
Yes, the amp sounded great at bedroom volumes for me.

_________________
[img]http://img32.imageshack.us/img32/6089/rib768.gif[/img] [img]http://i40.tinypic.com/19nrrr.gif[/img]

PGM301
Laney GH100L > Orange 2x12


Sat Nov 27, 2010 9:05 am
Profile
Viking Kong
User avatar

Joined: Sat Jan 13, 2007 7:37 pm
Posts: 5165
Location: London
Post Re: FML. My life is ruined.
From the seller:

"Now, here's some news from my end... a buyer came today to see the amp so we kept turning it up to test and it's probably the cheap damn chinese valves the previous owner installed but now the output volume is pretty tacky, keeps going up and down. The power section is perfect, no issues there but the preamp stage is having trouble. I hadn't fired up the amp for over 2 months and it worked fine at bedroom volumes before.

Anyway, I had one spare balanced valve (groove tubes) so I replaced the power driver stage in the VC50 and while that has bettered things it's far from perfect. You should know this but based on my experience I can confirm upgrading these chinese preamp valves will have the amp singing again. I'll keep my groove tubes valve in the VC50's v6 position (phase inverter/power driver).

I'm also happy to get it fully re-tubed for the buyer, but that will cost about 70-80 quid more. If you've already got some valves you can bring them to confirm the amp is working."


Baww. Still, if it got retubed, and I could collect it for £280.... that's not bad at all... is it?

Will change thread name accordingly.

_________________
Thanks MDucran


Sat Nov 27, 2010 2:37 pm
Profile
Viking Kong
User avatar

Joined: Sat Jan 13, 2007 7:37 pm
Posts: 5165
Location: London
Post Re: FML. My life is ruined.
ohsht. Could a moderator change the thread name to "First time buying amp issues" or something relevant.

_________________
Thanks MDucran


Sat Nov 27, 2010 2:37 pm
Profile
Search Button God!
User avatar

Joined: Fri Apr 15, 2005 10:05 pm
Posts: 5107
Location: Mailbag Of Doom
Post Re: First time buying amp issues
Done :)

_________________
Image


Sat Nov 27, 2010 5:42 pm
Profile
Viking Kong
User avatar

Joined: Sat Jan 13, 2007 7:37 pm
Posts: 5165
Location: London
Post Re: First time buying amp issues
Ah thanks Lamer!

Wanted to ask, how much should 6 replacement ECC84 preamp valves would cost? They tend to be around £10 each at some UK stores, is this an ordinary amount? I may just replace them myself.

Any other valves I could use in the preamp section?

_________________
Thanks MDucran


Sat Nov 27, 2010 6:27 pm
Profile
Viking Kong
User avatar

Joined: Fri Feb 18, 2005 6:46 pm
Posts: 5489
Location: Torrance California
Post Re: First time buying amp issues
In the US current production tubes usually range between $10 and $30 a piece. £10 is about $15 so thats within that range.

_________________
Image


Sat Nov 27, 2010 6:57 pm
Profile
Superhero
User avatar

Joined: Sat Jan 28, 2006 9:27 pm
Posts: 1207
Location: Wales UK
Post Re: First time buying amp issues
Zae wrote:
Ah thanks Lamer!

Wanted to ask, how much should 6 replacement ECC84 preamp valves would cost? They tend to be around £10 each at some UK stores, is this an ordinary amount? I may just replace them myself.

Any other valves I could use in the preamp section?


Are you sure it uses ECC84 valves?

An ECC84 is still a dual triode valve, but has a different pinout to an ECC83 which is typically used in valve amplifiers. An ECC84 has a mu valve of about 24 as well, as apposed to an ECC83 which has a mu of 100.

_________________
Image Image
Image


Sat Nov 27, 2010 11:06 pm
Profile
Viking Kong
User avatar

Joined: Sat Jan 13, 2007 7:37 pm
Posts: 5165
Location: London
Post Re: First time buying amp issues
Really sorry, I DID mean ECC83. Typo'd that.

All I'm saying is that the amp would need 6 ECC83s. Are there any other cool tubes to try? Not sure what they all sound like. Seller mentioned EL34's, KT77's or 6L6's, thought the manual says ECC83 for the preamp, and 5881s for the Power Amp.

Anyone know a good source for valve info?

_________________
Thanks MDucran


Sat Nov 27, 2010 11:42 pm
Profile
Viking Kong
User avatar

Joined: Fri Feb 18, 2005 6:46 pm
Posts: 5489
Location: Torrance California
Post Re: First time buying amp issues
Theres tons of info on tubes online. I'd have to search for a good introduction to tubes. There are some tube primers here http://www.guitaramplifierblueprinting.com/Primers.html They can get kind of technical though. They are a few years old, but theres still plenty of good info in there.

5881's are a type of 6l6. ECC83's are 12ax7's. So you can search for tubes under those names also. There are other types of tubes that you can substitute for 12ax7's but they are lower gain. I wouldn't worry about those for now.

_________________
Image


Sun Nov 28, 2010 3:00 am
Profile
Viking Kong
User avatar

Joined: Fri Feb 18, 2005 6:46 pm
Posts: 5489
Location: Torrance California
Post Re: First time buying amp issues
Looking at the manual the VC series amps came stock with 5881's but also have a bias switch on the back panel so you could use EL34's.

_________________
Image


Sun Nov 28, 2010 3:03 am
Profile
Superhero
User avatar

Joined: Sat Jan 28, 2006 9:27 pm
Posts: 1207
Location: Wales UK
Post Re: First time buying amp issues
Damn, 6 of them? If someone could find a schematic for the amp, some advice could be given on what some useful valve substitutions would be. I have no idea of the topology of a VC50 so suggesting different valves at this point and randomly swapping in different valves would be a bit crude.

But just to clarify, EL34's and 6l6's are power valves, whereas ECC83's are preamp valves. In person you can clearly see that power valves are physically much bigger, and fit larger sockets, so there would be no confusion in trying to swap these :P

I highly doubt that the amplifier would be using 6 ECC83's for amplification and gain, more than likely there will be a few running reverb circuits and such (like i said, i have no idea of the topology of a VC50), so if you could supply a schematic, i would be more than happy to help :)

_________________
Image Image
Image


Sun Nov 28, 2010 5:26 pm
Profile
Viking Kong
User avatar

Joined: Fri Feb 18, 2005 6:46 pm
Posts: 5489
Location: Torrance California
Post Re: First time buying amp issues
GeorgeLynchTiger wrote:

I highly doubt that the amplifier would be using 6 ECC83's for amplification and gain, more than likely there will be a few running reverb circuits and such (like i said, i have no idea of the topology of a VC50), so if you could supply a schematic, i would be more than happy to help :)


according to the manual it has 6 preamp tubes.

1 First gain stage-Clean channel
2 2nd gain stage-Clean channel
3 First gain stage Drive channel
4 2nd gain stage Drive channel
5 3rd gain stage Drive channel
6 Power driver stage

The manual: http://www.laney.co.uk/manuals/VC50-100-VH100R%20Manual%20-%201995%20-%20Issue%201.1.pdf

_________________
Image


Sun Nov 28, 2010 6:05 pm
Profile
Viking Kong
User avatar

Joined: Sat Jan 13, 2007 7:37 pm
Posts: 5165
Location: London
Post Re: First time buying amp issues
The above is what I was using as a reference, yeah. I may just stick the stock tubes in there.

I'm gonna go out to see the amp on Tuesday, in person. Give it a little try to see if everything else is in order, and if it's right fo' myself. Will wait til then to update this thread.

_________________
Thanks MDucran


Mon Nov 29, 2010 12:24 am
Profile
Superhero
User avatar

Joined: Wed Sep 03, 2008 4:00 pm
Posts: 1654
Location: London UK
Post Re: First time buying amp issues
Congrats mate, happy I could help. Have you tested out the switch on the back?

_________________
[img]http://img32.imageshack.us/img32/6089/rib768.gif[/img] [img]http://i40.tinypic.com/19nrrr.gif[/img]

PGM301
Laney GH100L > Orange 2x12


Tue Nov 30, 2010 9:27 pm
Profile
Viking Kong
User avatar

Joined: Sat Jan 13, 2007 7:37 pm
Posts: 5165
Location: London
Post Re: First time buying amp issues
sharpant wrote:
Congrats mate, happy I could help. Have you tested out the switch on the back?


Which one? Everything was shown to be in working order, I witnessed myself how badly the tubes were going, he kindly gave me advice on where to buy new tubes, and where from. He showed the power section was working fine. He showed me the back and how everything was doing there. The only thing he said wasn't working too well was the jack on the footswitch (heard of that problem often on Laney amps).

_________________
Thanks MDucran


Tue Nov 30, 2010 10:10 pm
Profile
Display posts from previous:  Sort by  
Reply to topic   [ 24 posts ]  Go to page 1, 2  Next

Who is online

Users browsing this forum: Bing [Bot] and 5 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group.
Designed by ST Software for PTF.