Fuse problems with used VH4

[elfredoo]

hi guys,

just bought a vh4 from ebay cause i wanted one so badly all along. it arrived yesterday, yeah! but two fuses (3 and 4) are blown and the fuse caps 3 and 4 (other than 1 and 2) seem very used...

do i have to fear a soon breakdown? is this a sign that i have bad el34s in pos 3 and 4?

buy the way it has the serial number 080104Z. does that mean it was produced on january 4th 2008?

 

[MARK2C]

The tube could have been damaged in shipping. As for the fuse holders, they are not meant to see a lot of use and get worn out
fats when not using the right tool. Maybe Peter can post the replacement part number from Schurter or you can email him.
I have never worried about any of my VH4's not being reliable.

Your Serial Number:

08- 2008

0- VH4 Mono

141- 141st Made in 2008

Z- I have no Idea

 

[elfredoo]

well the "Z" could also be a "2" but 1042 are quite a number for handbuilt amps?! That would be 5 VH4 per day...

i plugged in some new fuses and see what'll happen... but i'm a bit puzzled about the worn out fuse-caps for V3 and V4...

i started to pull tubes to see what i got:
- 4x EL34L JJ
- V1-V2: TAD 7025/E83CC Highgrade
- V3: no name
- V4-V7: TAD 12AX7A-C selected
are these the standard tubes on a 2008-Vh4?

i think i'll retube the beast... as discussed here: viewtopic.php?f=14&t=63598 a good choice can be:
- 4x EL34BHT
- V1: TAD 7025 premium
- V2-V7: Shuguang 12AX7B

Any new insights on this tube combination?

 

[Peter Diezel]

1994 till 2010, let´s say 200 working days a year = 3200 days.

1402 / 3200 days = 0,438 pieces a day

And it depends also on the number of members there
are in the company. I´m right or wrong ?

 

[Peter Diezel]

Btw, fuse caps and fuse socket is type FEF from SCHURTER.

 

[elfredoo]

Ah OK , thought it were 1042 pieces in the year 2008... that would be .... 1042/200 = 5 per day... record challenging

... AND by the year 2020 the guitar world would be diezelfied!!

 

[Peter Diezel]

 

[elfredoo]

love (!) the second channel by the way....

thanks for this great amp, peter! no amp ever suited me that well... and midi-integration with the g-system is smoooooooooooooth


do i have to fear a powertube failure in near future if the fuses 3 and 4 blew the second time??

 

[Peter Diezel]

Well, take an eye on it. If You want to be safe
put an quartet EL34BHT in it.