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Type: Posts; User: fredv

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  1. Replies
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    Wanted Andy, Good to hear you like the ML-20, I am...

    Andy,

    Good to hear you like the ML-20, I am really happy that the ML is in good hands. Or I should say good ears :-)

    MM,

    LOL, I unloaded 1/5 of the metal and am still keeping the heavy one...
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    850

    I will be lot of town sooner today, but I did...

    I will be lot of town sooner today, but I did went through all the posts!! Yes, use LDR for both series/shunt is the way to go. For a stereo SE input, this will need 2 matching pairs, i.e. 2 sets of...
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    850

    It sounds like you plan to build a balance...

    It sounds like you plan to build a balance version. I will let you know what I end up with. Just a heads up, the choice of the impedance of the pot and the number of LDR's one pot drives has a...
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    850

    I think you are referring to Uriah, he is nice...

    I think you are referring to Uriah, he is nice guy. I bought my unmatch LDR's from his group buy. I am doing the matching myself because I wanted to know more about this devices.

    I can tell you...
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    Have you done your LightSpeed passive, Ben?

    I just started the hell process to match up the 50's that I have. It is really hard to measure them because the same LDR can vary at different time of the day. However, the reward seems to be great...
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    Review A word of caution about modifying the cdp, you...

    A word of caution about modifying the cdp, you effectively give Pacific Valve the excuse not to honor the warranty if anything (not related to the mod) goes wrong. I recommend you to wait a little.
    ...
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    884

    Need Help I'm in the SF BA, but I have yet to build my very...

    I'm in the SF BA, but I have yet to build my very first DIY speaker. I have been hoping someone nearby has the wood work skill and tools :D

    With some good suggestion from other members (in a...
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    634

    Hee hee, I am not trying to start a bussiness. ...

    Hee hee, I am not trying to start a bussiness.

    I built a similar el cheapo parallel power filtering circuit in a recycle head lamp plastic box with a pig tail (main cable), LOL.

    Based on the...
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    3
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    634

    Does anyone know where to buy one of these?

    I am looking for the case that is used for the power enhancer of
    http://alanmaherdesigns.com/PEC.aspx
    It could my dumb head. I try various Google and Ebay searches but got nothing close to this....
  10. Replies
    23
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    4,642

    Hi Ben, I just love to try different types of...

    Hi Ben,

    I just love to try different types of gears, SS or tube, but don't have the deep pocket to support. So, DIY is the only way to fulfill my desire .... Obviously, I am a little bias on the...
  11. Replies
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    4,642

    I only use a human SPL meter to test the...

    I only use a human SPL meter to test the loudness. She yelled at me to lower the volume. So loud enough to get me in trouble even with the Monitor 5's. However, I am talking about listening in the...
  12. Replies
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    2,383

    Need Help It is just for show, kind of like the old volume...

    It is just for show, kind of like the old volume meter, no impact to the sound.
  13. Replies
    23
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    4,642

    Hi there, Today, I removed the variac and...

    Hi there,

    Today, I removed the variac and powered it up at 100% main voltage. No loud thump, no blown fuse, looks like the 0.68uF X2 cap and double inrush limiters really helped to solve last...
  14. Replies
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    4,642

    Mini-Aleph is singing, and I am not dreaming :D ...

    Mini-Aleph is singing, and I am not dreaming :D

    At the moment, the big caps are not in as I need the space to hook up my DMM. The amp is really dead silent, the only slight hum is from my tube...
  15. Replies
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    4,642

    H9, You can do it. It is pretty much follow...

    H9,

    You can do it. It is pretty much follow the BOM and schematic and stuff the board. I think the hardest part is trouble shooting when it doesn't work as expected. I actually had a fair share of...
  16. Replies
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    4,642

    I think the "give some and get some" strategy...

    I think the "give some and get some" strategy will work especially the part to use the tool for something she wants first. That actually worked in the past!!

    Which F5 did you end up buying,...
  17. Replies
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    4,642

    ShinAce, Yes, it is a class A MOSFET SE amp....

    ShinAce,

    Yes, it is a class A MOSFET SE amp. The heat sink are not small in terms of length and width, but the fins are too short. I did test the soldered board for proper electrical measurements...
  18. Replies
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    4,642

    The router is for cutting the circular opening,...

    The router is for cutting the circular opening, right? Sounds like I shall get one of these first as I probably can pay a little to the lumbar shop to cut the big panels for me. You guys are talking...
  19. Replies
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    4,642

    My Mini Aleph progress

    Don't want to side track the other thread.
    So, here is how my Mini-Aleph looks like currently.

    As the other Fred, I also have doubt 10W is going to meet my needs, but the experience to try...
  20. Replies
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    2,138

    Yup, yup, my junk heat sinks are not up to the...

    Yup, yup, my junk heat sinks are not up to the task to dissipate no more than 50W of heat from the FETS. Otherwise, I would go for the Aleph 30. I will start out at 1A bias and push it up until the...
  21. Replies
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    2,138

    30's can only be in my second life, and can say...

    30's can only be in my second life, and can say the same for 40's in the not too far away future :D

    BTW, the M5's are very good bench speakers and have reasonably good resolution to tell me...
  22. Replies
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    2,138

    I have only done upgrade to Polk Monitor 5 and 7...

    I have only done upgrade to Polk Monitor 5 and 7 (they actually have the ame xover).
    My opinion is my own and limited to my experience with these 2 models.
    Crossover tweak to these low cost Polk...
  23. Replies
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    2,138

    The so called kit pretty much a set of caps and...

    The so called kit pretty much a set of caps and resistors of the exact values. You can do better by sourcing yourself, just take a look at the schematic to find out the parts.

    There is a point of...
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    Yes, the soldering and desoldering technique is...

    Yes, the soldering and desoldering technique is pretty much the same. It is also possible that is is a through hole. If so, there will be pads on both sides which sometimes can be a PITA to desolder....
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    I think that's what came with mine, too. That is...

    I think that's what came with mine, too.
    That is the tip I used all the time. I do have a finer tip as a back up for other tasks. I used the fine tip only in a few occasions. It is around 5 bucks...
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