MTS Forum Forum Index
Discussion forum for Synergy, Egnater & Randall MTS Amps & Modules
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Another noob post

 
Post new topic   Reply to topic    MTS Forum Forum Index -> Egnater / Randall Modular Amps
View previous topic :: View next topic  
Author Message
winfield1980
RM20


Joined: 27 May 2006
Posts: 2

PostPosted: Sat May 27, 2006 2:41 am    Post subject: Another noob post Reply with quote

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.com/weber/lpld.htm
https://weberspeakerscom.secure.powweb.com/weber/minimass.htm
https://weberspeakerscom.secure.powweb.com/weber/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/087930863X/qid=1148644363/sr=2-2/ref=pd_bbs_b_2_2/102-2970316-1240940?s=books&v=glance&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
Back to top
View user's profile Send private message
Scooter
RM100


Joined: 30 Apr 2006
Posts: 373
Location: S.E.Wisconsin

PostPosted: Sat May 27, 2006 7:04 am    Post subject: Reply with quote

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.
Back to top
View user's profile Send private message
stevearino
RM20


Joined: 23 May 2006
Posts: 29

PostPosted: Sat May 27, 2006 7:16 pm    Post subject: Reply with quote

Hello to one newbie from another. Very Happy
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. Smile
Back to top
View user's profile Send private message
joey_truelove
RM100


Joined: 08 May 2006
Posts: 410
Location: Dales district, Sweden - heartland of Swedish folkmusic

PostPosted: Thu Jun 29, 2006 3:54 am    Post subject: Reply with quote

Yellow Jackets could be one route to consider. A single pair of those and your output will drop considerably.
Back to top
View user's profile Send private message
MetalMajik
RM100


Joined: 15 Apr 2006
Posts: 222
Location: Noblesville IN

PostPosted: Thu Jun 29, 2006 2:56 pm    Post subject: Reply with quote

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?
Back to top
View user's profile Send private message
ned
Site Admin


Joined: 02 Mar 2006
Posts: 799

PostPosted: Thu Jun 29, 2006 3:12 pm    Post subject: Reply with quote

Other than bias between .18 - .26 and your good to go.
_________________
Grail Tone - Amp Settings
My Rig: Egnater Mod 50 1x12 Combo w/ VX and SL2 modules
FX: Digitech GSP1101, RM4 w/ SuperV, JTM45, Plexi, XTC, KH2, TB
Personal Web Page
Back to top
View user's profile Send private message
winfield1980
RM20


Joined: 27 May 2006
Posts: 2

PostPosted: Wed Aug 09, 2006 9:38 am    Post subject: Reply with quote

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.
Back to top
View user's profile Send private message
I_like_skittles
RM20


Joined: 08 Aug 2006
Posts: 2

PostPosted: Wed Aug 09, 2006 11:00 pm    Post subject: Reply with quote

you know that cutting power in half only drops volume by 3 decibles
Back to top
View user's profile Send private message
lightwoheat
RM20


Joined: 22 Jun 2006
Posts: 44
Location: Melbourne, FL

PostPosted: Thu Aug 10, 2006 5:40 am    Post subject: Reply with quote

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
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    MTS Forum Forum Index -> Egnater / Randall Modular Amps All times are GMT - 6 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group