K
kevner21
Guest
is it nessessary to take the 4 resistors completely out of the circuit or can I leave one lead connected and cover the other lead? thanks
I would take them all the way out.
I think it would take more effort to secure them properly so that they won't move with one detached lead compared to just removing them completely.
I think it would take more effort to secure them properly so that they won't move with one detached lead compared to just removing them completely.
Paul Joppa
Moderator
I am guessing you want to see what it sounds like before committing to the change?
I agree with PB on the practical and safety aspects. All these resistors are as accessible as possible; that was part of the layout design. Remember that resistors get hot, so plastic ties are not a good way to immobilize them! The power supply resistors are nearly impossible to tie down anyhow, and dangerous because of the high voltage on them.
Nevertheless, I will admit that it's not technically necessary to do more than disconnect one end in order to get the circuit working.
I agree with PB on the practical and safety aspects. All these resistors are as accessible as possible; that was part of the layout design. Remember that resistors get hot, so plastic ties are not a good way to immobilize them! The power supply resistors are nearly impossible to tie down anyhow, and dangerous because of the high voltage on them.
Nevertheless, I will admit that it's not technically necessary to do more than disconnect one end in order to get the circuit working.
K
kevner21
Guest
Thank you , I have safety drilled into me every job I go to , so I will remove them .Thanks
K
kevner21
Guest
theres not a lot of writing on this 45 tube , and the nos tubes I acquired are probably half life at best . Is it worth the endeavor????
K
kevner21
Guest
ill answer this myself . "you bet it is!!!!!
Natural Sound
New member
The 45 is a very special tube. I use them myself in a pair of Paramour II mono-blocks with the Stereomour Iron upgrade. As long as you don't expect rock concert dB levels and have relatively efficient speakers They really are a nice option.
I'm considering a consolidation project to downsize my system a bit. What I'm thinking is replacing a FPIII and Paramour II's with a Stereomour. That way I'd go from 3 boxes to one and eliminate a couple of interconnects and power cords in the process.
If I go this route the Stereomour will be adjusted to run 45's.
I'm considering a consolidation project to downsize my system a bit. What I'm thinking is replacing a FPIII and Paramour II's with a Stereomour. That way I'd go from 3 boxes to one and eliminate a couple of interconnects and power cords in the process.
If I go this route the Stereomour will be adjusted to run 45's.
K
kevner21
Guest
hi natural sound having listened to the 2A3 STEREOMOUR ,which is really fine and changed the amp over to a 45tube . the transformation is truly magical. At 1.5 wpc ,its not for everyone .only the most efficient speakers will do.
I built my Stereomour for 45's but found out that it's running the tubes at 11.25 watts. I changed the resistors so it would run at 8 watts. I'm using the same old, used tubes from ebay for about 2 years now. The resistors are Mills 12-watt, no problem with heat.
Here's the link:
http://bottlehead.com/smf/index.php?topic=3252.msg27830#msg27830
Here's the link:
http://bottlehead.com/smf/index.php?topic=3252.msg27830#msg27830
K
kevner21
Guest
I built my stereomour completely stock . Why?, because I've reasoned ,over the years , you do not get a lot better sound out of boutique caps , resistors , wire . I've done that with too many pieces of equipment. It's the circuit that sounds so good, or not !!!! Give the stock kit a chance , it will amaze you!!!!
I'd second the "Build it Stock" notion.
Attention to the build quality, wiring routes, good solder joints etc will deliver you an Amp with excellent performance.
There is a time when "the Law of Diminishing Returns" applies. There is an arguement as to just how different % wise a $100 dollar capacitor will sound over a $10 cap. Will it sound 10 times better ? Will it even sound twice as good ?
As Peter Walker (QUAD) said, "if you can hear it, I can measure it".
With my Stereomour, the only thing I have done is change the Tubes to Miniwatt 2A3s from the 50s and a Mullard M8162 for the driver, because I had them in the "old tube box". They do sound better than current Russian or Chinese offerings to my ears, on my speakers and are less microphonic.
I would think some of the greatest changes in the sound of the amp are achieved with a good set of tubes. It may take some time to find, but that's the fun of tube rolling.
I did a similar experiment with the Crack amp. After about a dozen 12AU7 changes from the box I found a Haltron that sounds just perfect and after 5 6080/6AS7 changes , an RCA just excelled. All other parts are absolutely stock, although I did use some cloth covered wire in different colours for the nostalgia.
Maybe obtain a less expensive pair of 45s to set it up and test then move to a premium set when you're sure you're not going to burn them up.
Anyway, that's my 2c worth . The design is what makes it sound the way it does to the greatest extent.
Attention to the build quality, wiring routes, good solder joints etc will deliver you an Amp with excellent performance.
There is a time when "the Law of Diminishing Returns" applies. There is an arguement as to just how different % wise a $100 dollar capacitor will sound over a $10 cap. Will it sound 10 times better ? Will it even sound twice as good ?
As Peter Walker (QUAD) said, "if you can hear it, I can measure it".
With my Stereomour, the only thing I have done is change the Tubes to Miniwatt 2A3s from the 50s and a Mullard M8162 for the driver, because I had them in the "old tube box". They do sound better than current Russian or Chinese offerings to my ears, on my speakers and are less microphonic.
I would think some of the greatest changes in the sound of the amp are achieved with a good set of tubes. It may take some time to find, but that's the fun of tube rolling.
I did a similar experiment with the Crack amp. After about a dozen 12AU7 changes from the box I found a Haltron that sounds just perfect and after 5 6080/6AS7 changes , an RCA just excelled. All other parts are absolutely stock, although I did use some cloth covered wire in different colours for the nostalgia.
Maybe obtain a less expensive pair of 45s to set it up and test then move to a premium set when you're sure you're not going to burn them up.
Anyway, that's my 2c worth . The design is what makes it sound the way it does to the greatest extent.
