choke mod for 5e3

[martin]

I`d like to try to add a choke to my 5e3 but can anyone tell me
wich one to use? Will simply any choke labeled 3H do or are there
any more variables (ohmage or whatever) to concern?

I`d get one from Bruce with no worries if i lived nearby but sadly I´m on the other side of the planet so...

[Bruce / Mission Amps]

Where on the other side of the planet?
Yes, a 3Hy to 5Hy @ 50-60ma choke is all you need.
You'll need to rewire the sockets with a Fendery 6L6 power tube layout using 470 ohm to 1000 ohm screen resistors on the socket lugs and a rebias of the power tubes as they will draw too much idle current with a choke instead of the 5K resistor.

[sjhust]

What would happen if you used both the choke and the 5K?

steven

[galibier_numero_un]

What would happen if you used both the choke and the 5K?
steven

I've found that decreasing the DCR anywhere in an audio circuit tends to impart a livlier more "see-through" sound.

By leaving the resistor in line with the choke, my guess is that you would "sit on" the dynamics and transparency. IOW, you wouldn't get the full benefit of replacing the resistor with the choke. More isn't always more :D

Note that I've never tried this combination, so reality may conflict with theory :confused:

Cheers,
Thom

[martin]

Where on the other side of the planet?
In Estonia :)

Question for those who have added a choke for 5e3:
Roughly how much does the value of the 250 ohm cathode resistor
need to be risen in order to get the bias back to where it should be?

[flythair1]

Hello Ampage Community!,

I have a scratch built 5E3 that I used a 10H choke with and I did not do any modifications yet but it seems to play very nicely as it is. Bruce, I'm looking at a shemo for your "Tweedy Deluxe" (latest date is Oct 2004). With the choke installed, where do the 470-1k screen resistors go, pin 4 to ground on the 6V6's? I'll check the current and probably raise the value of the cathode resistor?? Can an adjustable bias be installed in this circuit? If so where?
I used an old DuKane PA head for the platform for the 5E3 circuit. The DuKane was near mint when I found it. I used the transformers & sockets but that's about all. It fired right up and only needed minor tweeking. This was my first build but before I got this amp running I built a P1eX AX84 project. All scratch built with a salvaged chassis & trannies & some odds and ends. That one turned out neat also.
Thanks!!

Scott