Ask and ye shall receive.
You'll notice a slight difference between this most recent model and a pre 2005 most notably a different amp output board. Different compliment of output transistors and has twin heatsinks.
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Amp Guts Photos - Official Thread - Lets see those pics
- Thread starter svtb15
- Start date
Ask and ye shall receive.
You'll notice a slight difference between this most recent model and a pre 2005 most notably a different amp output board. Different compliment of output transistors and has twin heatsinks.
Found the old photo of the pre 2005 Walkabout! This is from vin*tone where he had put a different transformer into it to get his local AUS power source to work.
It's not a true bass amp, but I suppose it could be used for a low power rig, but I wouldn't rely on this one. It was given to me by a former employer who owed me (a lot).
After powering it up and smelling it I can see why he gave it away and as far as I'm concerned, he still owes me. Another tech had already replaced the apparently burned components, but I replaced several burned traces that looked like they wouldn't last long. It's still working, but I'm just using it as a playback amp in my practice room, so if/when it dies I'll junk it.
After powering it up and smelling it I can see why he gave it away and as far as I'm concerned, he still owes me. Another tech had already replaced the apparently burned components, but I replaced several burned traces that looked like they wouldn't last long. It's still working, but I'm just using it as a playback amp in my practice room, so if/when it dies I'll junk it.
- Mar 22, 2004
- 13,004
- 4,741
- Disclosures
- I play it all. Whatever works for the gig. Q+
I'm on my iPhone and can't see but it looks like a d60. Many years ago I used that for the horn on a jbl lens on my bass rig. It was the 70s. Had a dc300 for bottom then later a bgw. Ahhhh a crown d60
- Mar 22, 2004
- 13,004
- 4,741
- Disclosures
- I play it all. Whatever works for the gig. Q+
- Mar 22, 2004
- 13,004
- 4,741
- Disclosures
- I play it all. Whatever works for the gig. Q+
Ahhh thank you
Ask and ye shall receive.
You'll notice a slight difference between this most recent model and a pre 2005 most notably a different amp output board. Different compliment of output transistors and has twin heatsinks.
- Mar 22, 2004
- 13,004
- 4,741
- Disclosures
- I play it all. Whatever works for the gig. Q+
I love the glass... I think i need to find a walkabout...And see how it does with a 4 ohm load into a large cab... Would love to get the VOL i need from it..
Here's a gut shot from an amp you can't even buy yet.
- Mar 22, 2004
- 13,004
- 4,741
- Disclosures
- I play it all. Whatever works for the gig. Q+
Looking at the Ashdown guts almost confirms rumours I heard a long time ago.
Even the dang output board looks identical to the error prone bipolar bear pcb.
Even the dang output board looks identical to the error prone bipolar bear pcb.
GK 400RB-III,
Kustom B1-15 cab with JBL Signature Speaker
model D140F 8 ohm,
Tabdog
Kustom B1-15 cab with JBL Signature Speaker
model D140F 8 ohm,
Tabdog
- Mar 22, 2004
- 13,004
- 4,741
- Disclosures
- I play it all. Whatever works for the gig. Q+
- Mar 22, 2004
- 13,004
- 4,741
- Disclosures
- I play it all. Whatever works for the gig. Q+
okcrum
in your chest
Man, you could add a second channel, tremelo, reverb, and a digital counter to that Earth head, with all the extra tube sockets cut out already. 
That's probably what they did, too.
That's probably what they did, too.
Had a friend's Marshall DSL100 apart recently and snapped a few pics. The amp was blowing HT fuses, so we tried the obvious - new power tubes. The old tubes were about 2 years old and the amp wasn't heavily used in that time, but it blew 2 HT fuses in 3 months or so. After the new tubes, it was good for another 2 months or so and then pop - HT went again.
I pulled the amp apart to clean the tube board and check for any signs of shorts.
This caught my eye and got me searching the webs for the purpose of this cap that was apparently missing.
C46 in these amps was added in the later revisions (not present in early DSL100 or any DSL50 models). It sits between the plate and screen of the power tubes, rated at 22pF/500V. Apparently they blow in many amps and take out other components so people recommend upping the voltage rating to 1000V+ or removing the cap so it doesn't blow. Looks like someone removed this cap in this amp (friend bought it used about 3-4 years ago). Reading up on it a bit it appears that the cap was added to tamp down some power amp oscillation that people were seeing. Probably the source of our blowing fuses. Waiting on the caps to arrive so I can test it out.
Top side of the tube board. The amp got wet at one point (not while in use) so I cleaned this up a bit as well to be sure that wasn't causing any issues.
All those wires! I labeled them as I pulled them so I could reassemble quicker. Pain in the backside.
Something more fun, my Sound City L120. I've made a few tweaks here and replaced a lot of out of spec/heat sensitive components in this amp along with the cap job and retube and such a while back (I think I posted progress pics in this thread). Anyways the amp has been quiet and reliable ever since. A real interesting piece and much different than my other amps.
I pulled the amp apart to clean the tube board and check for any signs of shorts.
This caught my eye and got me searching the webs for the purpose of this cap that was apparently missing.
C46 in these amps was added in the later revisions (not present in early DSL100 or any DSL50 models). It sits between the plate and screen of the power tubes, rated at 22pF/500V. Apparently they blow in many amps and take out other components so people recommend upping the voltage rating to 1000V+ or removing the cap so it doesn't blow. Looks like someone removed this cap in this amp (friend bought it used about 3-4 years ago). Reading up on it a bit it appears that the cap was added to tamp down some power amp oscillation that people were seeing. Probably the source of our blowing fuses. Waiting on the caps to arrive so I can test it out.
Top side of the tube board. The amp got wet at one point (not while in use) so I cleaned this up a bit as well to be sure that wasn't causing any issues.
All those wires! I labeled them as I pulled them so I could reassemble quicker. Pain in the backside.
Something more fun, my Sound City L120. I've made a few tweaks here and replaced a lot of out of spec/heat sensitive components in this amp along with the cap job and retube and such a while back (I think I posted progress pics in this thread). Anyways the amp has been quiet and reliable ever since. A real interesting piece and much different than my other amps.
