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Old 12th May 2013, 02:55 PM   #731
kazap is offline kazap  Australia
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The B
Quote:
Originally Posted by gregdee View Post
...... I would like to recommend one more .
Chatham JAN-CAHG 5R4WGA rectifier.
I have a 5R4WGB here from another amp so Ill give it a spin in my Tram2 and report back soon. I dont know how its meant to sound compared to the recommended 5R4WGA? The B model is ruggedized and made with stringent quality control so its good for 60,000' - just what the high flying Tram2 owner needs

I hope you enjoy your Tram2 audition. Just be careful running 2A3's unless you know it has heater regulators installed that can handle the load

Last edited by kazap; 12th May 2013 at 03:01 PM.
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Old 12th May 2013, 03:48 PM   #732
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Originally Posted by rab28 View Post
Aha! Can you please post the Marantz model number.
I have the Marantz remote RC5200SR. It works selecting the TUNER function. For coding select any Marantz AV Receiver eg SR-7200 or SR-4200 should work and are in the Logitech database. Enjoy.
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Old 13th May 2013, 12:26 PM   #733
kazap is offline kazap  Australia
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Just tried my 5R4WGB rectifier vs a GZ33. Both are well used. The Tram2 still has Version II regulators and was running NU45's with an RCA6AS7.

Im my system the 5R4WGB was mildly noisy with hum. The hum might be partly due to a radiated field effect. Waving my hand near the rectifier made the hum more intense even with 45's shielded with tin can's.

The GZ33 in contrast had no hum even with the magic hand trick. The GZ33 to me sounded better with the music tighter and bass cleaner.

Id be interested to read how the recommended Chatham JAN-CAHG 5R4WGA sound if someone has one to try.

My Philips rectifier is sounding much better now it has over ten hours on it.
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Old 13th May 2013, 02:22 PM   #734
Desmo is offline Desmo  Denmark
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Originally Posted by gregdee View Post
Hi Morten

I am reading this thread quite a while. Congratulations on your mods , every single time executed neat and skillful. Great ideas here and fantastic atmosphere of sharing knowledge about this design. Regarding your 2399 ,it actually looks more like 5998 any brand inside than 6AS7G itself. Never tried those you have got ,by the way ,but they look pretty intriguing.

Regarding rectifiers shout out I would agree with your opinion about Mullard vs. Phillips having both long time and using in different amplifiers . It is more the matter of taste and getting balance in sound with particular electronics one is using than the class , where both are at its own. Going for GZ 37 for example will push tonal balance even more further into bass direction and give more meaty presentation , but sacrifice some dynamics , so it is always courses for horses and the matter of taste. I would like to recommend one more and not so expensive to buy for trying :
Chatham JAN-CAHG 5R4WGA rectifier. [ mine are all dated 5/ 1956 ]

Click the image to open in full size.

I found them to be very interesting alternative if compared against those mentioned above , and they always seemed to be most powerful of all if it comes to micro dynamics and speed. But again , I have never tried them in TRAM design , as I do not own it, BUT ... things might change soon as I had been offered to buy one and I am very looking forward to give it a run in my own rig. It belongs there as my amplification is dominated by 45 and 2A3 valves - among my favorites, hence an interest in this long time and excellent thread . All the best to all others who contributed into quality of this writing here , with greatest respect , Txs Gents
Thanks for the heads up on the 5R4WGA rectifiers, I have never heard about these tubes before (does this ever end..?)

Maybe I did not write clear enough regarding the 2399 tube... The 2399 is a 5998 that is for some reason branded 2399. It's NOT a 6AS7G tube..! So it's not that strange that it looks like a 5998 in it's structure

Fit some nice 2A3's from your collection when you get the Tram II, and let us know how you like the sound..!?
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Old 13th May 2013, 02:44 PM   #735
gregdee is offline gregdee  United Kingdom
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Originally Posted by Desmo View Post
Thanks for the heads up on the 5R4WGA rectifiers, I have never heard about these tubes before (does this ever end..?)

Maybe I did not write clear enough regarding the 2399 tube... The 2399 is a 5998 that is for some reason branded 2399. It's NOT a 6AS7G tube..! So it's not that strange that it looks like a 5998 in it's structure

Fit some nice 2A3's from your collection when you get the Tram II, and let us know how you like the sound..!?
* That's the best of it ,isn't it , so far if it doesn't brake the bank and allows applying little changes to overall voicing of the unit - it's just great

...by the way if you want to try it in your pre I can sent it to you , as I have 3 of them all together with myself.

* Right I see that now ; )

* I have following 2A3 :
Sovtek, old RCAs. KR Audio , Black Treasures(on loan) and TJ 2A3/n , special edition fake mesh plates
- will see how they do in my rig.

I also have following 45:
EML45 solid plate , VAIC 45 solid plate ,and some old ones different kind.

I will try them all ,with an accent put on the new ones and will report here about my findings. Further I will be glad to try different Mu Valve too ,but for now it's better to do one thing on time. I am carefully keep watching all your notes about 6AS7 / 5998 / 2399 so far

Thanks for all answers , also PMs

Last edited by gregdee; 13th May 2013 at 02:48 PM.
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Old 13th May 2013, 03:44 PM   #736
Desmo is offline Desmo  Denmark
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Wow, a nice collection of 2A3 and 45 tubes..! It would be really cool, if you could write a bit about their sonic footprint when used in the Tram II..!? The only ones from your collection that I know well is the Treasure 2A3-Z... Here in my system they are more full in the bass and less resolved than the TJ 2A3/SE that are much more open and linear sounding (in my system)...

I notice a few mesh-plates amongst your collection... The general rule is, that anything mesh-plate is too microphonic for the Tram, but it will be interesting to hear your feedback on this.
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Old 16th May 2013, 09:37 PM   #737
kazap is offline kazap  Australia
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If anyone want to buy a famous Brimar 5R4GY rectifier
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Old 17th May 2013, 05:31 AM   #738
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Originally Posted by ptashton View Post
..... Has anyone tried the Full Music 300b/2.5V/c tubes in the Tram2. Instead of the 45 or 2A3 sound, you can get the 300b sound with the same heater current as the 2A3. Any response. Peter
Will this 2.5V 300B work in the Tram2 with the standard and the Coleman regulators?

300B-Specs vs 2A3-Specs

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Old 17th May 2013, 08:17 AM   #739
gregdee is offline gregdee  United Kingdom
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It will act same as 2A3 in a circuit . I used those in my Fi X amp back in time, having loaners on the hand. For me replacing 2A3 for 300b , as this is what it does in a case of voicing, doesn't have any sense - simply because 2A3 posses superior sound signature if compared to 300b. My usual departure is other direction If one day they ever build 300b spec'ed 45 ,that would be way to go for to me

As old wise Japanese use to say :

The best 300b is ... 2A3 ,and the best 2A3 is 45 !

This formula have always worked for me fine, but it is just me, others might prefer sth different.
Anyway I keep thinking if presumably going down this route will make the best 45 ... WE 101D ?

As such an amp is now commercially available I have quite a dilemma ,hahaha

Last edited by gregdee; 17th May 2013 at 08:21 AM.
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Old 18th May 2013, 09:59 AM   #740
Desmo is offline Desmo  Denmark
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Originally Posted by gregdee View Post
As old wise Japanese use to say :

The best 300b is ... 2A3 ,and the best 2A3 is 45 !
And for the Tram II the best sounding 45 is a 2A3
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