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1  British Style / JTM 45, 50 / Re: Has anyone tried the JTM45/100? on: October 22, 2011, 01:31:47 AM
Well it's been over two years and wanted to say that this amp is still going strong, no problems. and when my cab speakers finally got broken in, it really shined!Th PPMV lets me play it in the smallest of venues and when I can crank it, it kills! If you want to hear it in action check my Bands youtube page.
Rannons' Call..Thanks again Nik!!
2  British Style / JTM 45, 50 / Re: Has anyone tried the JTM45/100? on: August 11, 2010, 10:55:51 PM
Hey Cam,
          Nik has a coupe of my clips posted on his site now.
   The first is clean,fuzz,clean
   The second is from my bands rehearsal
    Hope this helps
                              seeker
3  British Style / JTM 45, 50 / Re: Has anyone tried the JTM45/100? on: August 06, 2010, 02:52:42 AM
 Well, unfortunately i don't know how to post a soundclip. Can someone help? I appreciate it.
  Hopefully this falls under "there is no such thing as a dumb question".
4  British Style / JTM 45, 50 / Re: Has anyone tried the JTM45/100? on: June 21, 2010, 12:16:14 AM
 Just a quick update since it's been a year. My 45/100 is still sounding great with no problems and I plan on taking it in the stuido within the next couple of months
5  British Style / JTM 45, 50 / Re: Has anyone tried the JTM45/100? on: June 19, 2009, 04:06:16 PM
hired hand, thank you for your help.
      If you have any books or anything else to suggest that would help in the learning process of terms,locations,functions of parts or anything that you think I need to know,Iwould appreciate it.
             Again,Thanks..
6  British Style / JTM 45, 50 / Re: Has anyone tried the JTM45/100? on: June 16, 2009, 03:23:23 AM
I do want to build a 45 in the future for the knowledge but have not compared it to the 45/100.
  Was trying to give you an idea about the great tone and quailty of the45/100 in my first post.
 I researched Niks 45/100 before I ordered it and knew it was what i wanted. As I said in the first post the 45/100 with the mods Nik put in is perfect for me.This is my dream amp!My search for my perfect amp is over.
  I'm more than satisfied...
7  British Style / JTM 45, 50 / Re: Has anyone tried the JTM45/100? on: June 16, 2009, 02:44:41 AM
Volume,s  not an issue at all, I love loud...
 Now it's just time for me to sit back and enjoy the tone and the volume....
8  British Style / JTM 45, 50 / Re: Has anyone tried the JTM45/100? on: June 16, 2009, 02:04:48 AM
I think that for the moment i'm going to leave it alone and enjoy playing it.
 If you knew how loud it has to be to hear the ghosting and how faint it is you would see why I say i'm not going to worry about it.
 I'm just going to keep reading to gain more knowledge and ENJOY!!
9  British Style / JTM 45, 50 / Re: Has anyone tried the JTM45/100? on: June 16, 2009, 01:42:31 AM
Just checked :Plate voltage 485 which would mean that altough I might be running a little on the hot side of the bias it's not bad.
 Also tried running it biased colder but could still hear the faint ghosting. But do remember I only bearly hear it and then it's only at stadium levels,and i'm not joking we're talking very,very loud.
   It also sounds slightly better in the 38-40ma range.
 So, in the end I rebiased to Niks recommendation.



 
10  British Style / JTM 45, 50 / Re: Has anyone tried the JTM45/100? on: June 15, 2009, 06:26:42 PM
Thanks hired hand for the info for reading plate voltage,and what lightice is saying is one of the mods I had Nik do for me which is an external bias(probe sockets and an adjustable pot on top of chassis) since when I say i'm new at this I really mean it,so I'm really trying to live another day.
  What I'll do is bias it colder and see if that makes a difference report back and then follow your instructions on reading plate voltage..
 But like I said earlier the ghosting is very faint, only occurs at extreme volumes and not annoying,but this troubleshooting might be of help to someone else because it's definitely giving me a better undertanding of how this amp works...
 Just did a quick read on Metros' forum in the tube section and if I read correctly 400v*40ma would give me 16watts which would be 64% on my 25 watt Shuguangs.If my understanding is correct then that would mean that the 38-40ma range that Nik recommended would be just right.
 Hopefully you guys will check my math and let me know if i'm missing something. Embarrassed

11  British Style / JTM 45, 50 / Re: Has anyone tried the JTM45/100? on: June 15, 2009, 02:44:39 AM
hired hand just got back in town and saw your question so i doulbe checked Nik's e-mail.
 He did say he likes to see between 38-40ma on the kt66 tubes.I know just enough that I can bias them lower to see if that makes a difference but as far as plate voltage if you want to give me instructions on how to check it I'll be more than happy to and give you the results.
  I'll try biasing them lower  and crank my amp tomorrow if I have time and see if that makes a difference and let you guys know.
12  British Style / JTM 45, 50 / Re: Has anyone tried the JTM45/100? on: June 13, 2009, 02:57:22 PM
No,Nik said when he gave me directions on biasing that he liked it to be between 38 and 40 so I biased to the hottest tube to keep in range..
13  British Style / JTM 45, 50 / Re: Has anyone tried the JTM45/100? on: June 13, 2009, 01:41:01 PM
hired hand the highest ma is 40 the lowest 34 on the power tubes.
 I'll try another set of tubes as soon as I can make up a believeable lie,I mean reason to my wife for spending another hundred plus dollars on tubes. I'll also see who sells tubes that are matched..
  I want to add that like I said earlier the ghosting is faint and and unless it gets very annoying it's not a big deal so I'm going to approach this as a teachable moment on amp building and troubleshooting...
14  British Style / JTM 45, 50 / Re: Has anyone tried the JTM45/100? on: June 11, 2009, 07:18:56 PM
lightice from what I understand these old school amps are generally rated at RMS. In other words a 45/100 would be anywhere between 80 and 100 RMS,hope that helps.
  Also the comments of hired hand and hywelg have led me to not only to research B+ filtering but also what role the choke plays in filtering.
 I guess I'll check the choke size and ma. at a later date after more research since it seems that it along with the filtering cap could also be the culprit.
15  British Style / JTM 45, 50 / Re: Has anyone tried the JTM45/100? on: June 09, 2009, 07:36:08 PM
lightice thanks for this thread and yes  the HW1960A cab is what I want next.
  hired hand thanks for your words also.
 Nik and his people built this kit and did a great job,but what I want to do in the future is order an unasembled kit and have the satisfaction of building it myself so that when builders like hired hand talks about B+ filtering I'll know what he's talking about (HA,HA).
      I've been reading the forums that have builders talking about different aspects of mods and repairs to learn as much as I can because I don't want to ask questions about something you guys may think I should already know.
 Again lightice thanks for starting this thread and hired hand for your insight,hopefully others will chime in and my knowledge will grow.
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