Another noob post

Discussion for both Egnater & Randall modular amps

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winfield1980
RM20
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Joined: Sat May 27, 2006 2:37 am

Another noob post

Post by winfield1980 » Sat May 27, 2006 2:41 am

So I've got my randall RM100M about 6 weeks ago. I'm getting a touch confused with all the things necessary to make a tube amp run at its best.

A few things in particular concern me:

The power section is run by 4 6v6's, I want the amp to break up a little bit earlier (as well as save 2 power tubes). Is there a specific pairing I need to pull out? like 1 and 4 or 2 and 3 or will any 2 suffice. Wattage reduced to 50w. I plan on running this with only 2 power tubes 90% of the time. (any long term problems?)

Now, having pulled out 2 tubes and running at 50w which attenuator should I buy?

https://weberspeakerscom.secure.powweb. ... r/lpld.htm
https://weberspeakerscom.secure.powweb. ... nimass.htm
https://weberspeakerscom.secure.powweb. ... r/hpld.htm

Or would it be a better idea to buy a bigger attenuator?

Lots of money spent so lots of questions. I've oredered this http://www.amazon.com/gp/product/087930 ... e&n=283155 as a reference but I'd like to hear your thoughts as well.

Thanks for reading such a lengthy post
Last edited by winfield1980 on Wed Aug 09, 2006 9:39 am, edited 1 time in total.

Scooter
RM100
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Location: S.E.Wisconsin

Post by Scooter » Sat May 27, 2006 7:04 am

I believe you can pull the inner 2 tubes or the outer 2, but NOT one of each. Remember to cut the speaker impedence load in half when you do this. For example, if you normally have the switch set to 16 ohms, you need to switch it to 8 ohms.

I used to have a Weber Mass on my 100Watt Mesa DC-10. It worked pretty good. It did compress the sound quite a bit, though.

Be sure to get the 100W Mass even if you plan to run your amp at 50W. It will still work the same. However, if you got a 50W Mass, you could never use it on a 100W amp.

stevearino
RM20
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Joined: Tue May 23, 2006 7:35 am

Post by stevearino » Sat May 27, 2006 7:16 pm

Hello to one newbie from another. :D
I used to use a Hotplate with my DSL100 and didn't really prefer the tones I got from it. Contrary to what some people find, it affected my tone enough that I didn't like it at all. I ended up selling it(the Hotplate).
What I would do, and probably will do myself as I have 6L6's in my RM100, is get some E34Ls. Maybe some GT's or JJ's. They seem to be a bit more aggressive than EL34s are.
Good luck with whatever you decide to do. :)

joey_truelove
RM100
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Location: Dales district, Sweden - heartland of Swedish folkmusic

Post by joey_truelove » Thu Jun 29, 2006 3:54 am

Yellow Jackets could be one route to consider. A single pair of those and your output will drop considerably.

MetalMajik
RM100
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Location: Noblesville IN

Post by MetalMajik » Thu Jun 29, 2006 2:56 pm

I'll play ned here and say that you can also run JJ 6V6 tubes. 2 JJ 6V6's will drop your power down to 20-25 watts and they are much cheaper than yellow jackets. Just make sure you get JJ's as they are the only 6V6 tube that can handle the higher plate voltages of these amps.

Did I leave anything out ned?

ned
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Post by ned » Thu Jun 29, 2006 3:12 pm

Other than bias between .18 - .26 and your good to go.
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winfield1980
RM20
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Joined: Sat May 27, 2006 2:37 am

Post by winfield1980 » Wed Aug 09, 2006 9:38 am

thatnks guys, bought a 3 pairs of jj 6v6's and changed the bias. I also did buy a weber mass as well for my other amps but I've tried it with the RM100 with all 4 6l6's and it works a little bit better. But still much more convenient with the 2 6v6's.

I_like_skittles
RM20
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Joined: Tue Aug 08, 2006 1:00 am

Post by I_like_skittles » Wed Aug 09, 2006 11:00 pm

you know that cutting power in half only drops volume by 3 decibles

lightwoheat
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Post by lightwoheat » Thu Aug 10, 2006 5:40 am

1/2 is actually 6dB. I agree that it is not that big of a difference if the audience you play too is in a small room. However if you gig out and the sound equipment is sub-par at the facility (bar/club) then 6dB makes a big difference (50W to 100W) or (100W to 200W).

FM

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