RM100 combining tubes and 50 Watt ????

[newAgePunk]

First off I am sorry if this info is buried in these forums somewhere but I have been searching all the terms I can think of to find it .. without luck.

I want to know what the deal is with mixing tubes in the RM100. So running 2 x 6l6 and 2 x el34 etc...

Which sockets do the pairs work together in?

I have also read that you can effectively run it as a 50Watt amp if you remove 2 tube fuses to disable that tube. If this is true, is it safe ( I would just use it for home bedroom jamming) and also which ones should I pull out. I saw info on a schematic for the RM100 but I cannot make sense of that.

Cheers

 

[drewiv]

First off I am sorry if this info is buried in these forums somewhere but I have been searching all the terms I can think of to find it .. without luck.

I want to know what the deal is with mixing tubes in the RM100. So running 2 x 6l6 and 2 x el34 etc...

Which sockets do the pairs work together in?

I have also read that you can effectively run it as a 50Watt amp if you remove 2 tube fuses to disable that tube. If this is true, is it safe ( I would just use it for home bedroom jamming) and also which ones should I pull out. I saw info on a schematic for the RM100 but I cannot make sense of that.

Cheers

The tubes run as inside pair and outside pair. I've tried many combos, but I've never tried to run it as a 50W amp. Maybe somebody here has. I would assume, like other 100W amps, pull the outside tubes to run at 50W.

 

[Whoopysnorp]

You can pull either the inner or the outer pair (most of the time people recommend the outer pair, so the heat gets spread out a little better). I ran my RM100 this way for quite a while. Honestly, though, it isn't that much quieter. You'd be better off loading it with JJ 6V6s.

Similarly, if you're going to run two pairs of dissimilar tubes (e.g. 6L6/EL34), one type occupies the inner pair, and the other type goes in the outer. Lots of people like to run their RM100s that way, though I've never tried.

 

[sschultz242]

The two inside tubes are a pair as well as the two outside tubes. You're talking a minimal difference is decibel level by dropping it to 50 watts, but when I do this, I usually just pull the two outside tubes and call it a day

 

[BigBrewtus]

I ran that set up in the 100 I had. EHX6L6s inside JJsEL34s on outside. Great match. Best of both world IMO. Egnater doesnt recommend running just with 2 tubes as it makes everything run hotter(I believe). Have fun!

 

[Rod]

Also, when running just 2 tubes in a 100 watt amp you nerd to cut the impedance in half for your speakers. 16 ohm speaker running 50 watts you want the amp to run at 8 ohms

 

[newAgePunk]

Thanks for the feedback guys, and nice tip on the impedance Rod.

As a couple of you stated, regarding the 50 Watt side of things .. makes very little difference to DB level, well at a low volume test anyway.

I think I will order some 6L6's and try the split config, although I'll probably just get four 6L6's anyway.

Cheers