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Old 23rd March 2009, 12:30 AM   #1
diyAudio Member
Join Date: Mar 2009
Default Hi diyAudio forum

I'm a new member located in Sydney Australia.

I was moved to join after browsing your forum for help on
a problem I have with my GK 700RB bass guitar head.

By plugging in what was a short circuited lead into the output
plug of the head, I have damaged it.

On examination, I have found an electrolytic cap has exploded
and there are a number of resistors burnt on the power stage.

I'm looking to acquire some advice on how to get the unit operational again.

I hope I can just acquire the caps and the resistors I need. I have contacted GK about getting some information (schematic, bill of materials, parts specification)

I have an electronics background so will have no problem doing the actual parts replacement.
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Old 23rd March 2009, 02:10 AM   #2
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planet10's Avatar
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Welcome to the forum...

Is the GK tube or SS? (an indication of where a post for help should go)

community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
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Old 23rd March 2009, 03:31 AM   #3
diyAudio Member
Richard Ellis's Avatar
Join Date: Sep 2006
Location: Mar del Plata, a BIG seasonal getaway city, can see the Ocean from our residence.
Sad to say it is Solid State..............as an homage to tube amps it does have its G.I.V.E. system...or Gate Induced Valve Effect.
Do yourself a favor & find a true valve amp for your guitar. This is rated for 380 Watts and a "smaller" second 50 Watt amp. Why so much power I wonder?

Oh..By the way welcome Paul!
__________________________________________Rick.... .......
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Old 28th March 2009, 08:27 AM   #4
diyAudio Member
Join Date: Mar 2009
Thanks for the welcome Rick and Dave. Really an international forum. BTW - I have been in touch with Gallien and have acquired the schematic for the power stage so things are looking up.
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Old 28th March 2009, 05:42 PM   #5
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Cal Weldon's Avatar
Join Date: Jan 2004
Location: Near Vancouver
Hello Paul and welcome to the forums.
planet10 needs your help:
Let's help Ruth and Dave
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