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marshall choke replacement


 
1/20/2006 1:15 PM
Joe N.
marshall choke replacement
what do you guys think? A 10H, 90ma, 270ohm would make for a good 100W marshall choke replacement.
 
1/21/2006 4:16 AM
Chris/CMW amps

Hi Joe  
 
It also depends on the used materials, wire and way of winding and building but I love 10H chokes in 50 and 100 Watt Marshalls for blues and rock.  
 
Hope this helps,  
 
Chris
 
1/21/2006 8:03 AM
Joe N.

thanks chris,  
 
the one I'm thinking of using is from triad magnetics.  
 
http://www.triadmagnetics.com/subcategory/xref.asp?formid=mpart&reference=c-7x  
 
The model is c-7x. The specs look good. looks like it has enough current for a 100W, and the resistance is right in the ball park of what is normal, but I don't know how its made, or if any one has used it for a guitar amp. I also don't know the specs of the original marshall used. I guess in reality, it just has to be better than a resistor, and I'll be happy.  
 
-Joe
 
1/22/2006 2:57 AM
Chris/CMW amps

Hi Joe  
 
Haven't tried/used that one so I can't commend...  
 
About every choke is better than a resistor if that's needed :)  
Regardings Hs, current and ohms I don't see a problem using that Triad choke.  
 
Keep on building,  
 
Chris
 
1/23/2006 4:26 PM
Jimi

Hi Ive got a 135w fender twin, doesnt have a choke. Would it help to warm it up if I put one in there or even a resistor?
 
1/24/2006 2:08 PM
Chris/CMW amps

Hi Jimi  
 
You can convert the UL output to a regular one and install a replacement Fender choke. That choke will fit if mounted in a slight angle or you could slightly "modify" the small board above the new choke in the chassis.  
 
Besides other tweaks I've done this a couple of times in 75 and 135 Watt fenders for clients wanting a "better/more vintage" sound.  
 
Hope this helps,  
 
Chris
 
1/23/2006 8:30 PM
BK
270Ohm is a bit on the high side. You can get Hammond chokes of the rating down to 100Ohms. This wont drop your voltage as much.  
 
BK
 
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