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DIY, Mods & Tweaks | Forum profile
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Forum profile page for DIY, Mods & Tweaks on http://www.polkaudio.com.
This report page is the aggregated overview from a single forum: DIY, Mods & Tweaks, located on the Message Board at http://www.polkaudio.com.
This forum profile page summarizes the general forum statistics such as: Users Activity, Forum Activity, and Top Authors, which are reported in either a table or graph below for a given reporting time period.
Additional forum profile information for "DIY, Mods & Tweaks" on the Message Board at http://www.polkaudio.com is also shown in the following ways:
1) Latest Active Threads
2) Hot Threads for Last Week
Warning: These statistics are generated using 'best efforts' and can experience delays and reporting errors at times. Please note that such statistics do not constitute a forum's popularity and/or exact posting volumes at any given reporting period.
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Posting activity on DIY, Mods & Tweaks:
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Week
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3 Months
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Threads:
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33
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108
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309
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Post:
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128
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498
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1,552
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DIY, Mods & Tweaks Posting activity graph:
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Top authors during last week:
user's latest post:
Toroidal transformer ratings
Published (2009-11-27 01:17:00)
That Antek transformer is ideal and a great price.(as long as it is void of mechanical noise) Quote: Originally Posted by strider IIRC the LM3875 puts out around 56 watts per channel into 8 ohms. I did some actual measurements on a 3875 unit I built and would say the 56 watt rating is abit too optimistic,see post #3 for results. http://www.polkaudio.com/forums/show...clone+makeover You have some options depending on how many modules you...
user's latest post:
PR design program
Published (2009-11-22 16:11:00)
Quote: Originally Posted by GV#27 Bagby has one,heres a tutorial. http://techtalk.parts-express.com/sh...d.php?t=209863 lol, I was downloading it as you posted.
user's latest post:
DIY Budgetfile speaker...
Published (2009-11-27 03:05:00)
Quote: Originally Posted by GV#27 Yes it has been unseasonably warm , I attribute that to my recently spending a G note on a snowblower. Had I not we would have had three blizzards by now. OK thanks I guess thats why they don't state their addy on the website. I now have three excellent examples to work from should I decide to build a pair. lol I have the same kind of luck dude! It's OK though i don't mind it being nice and...
user's latest post:
Looking for opinions on SDA-1C...
Published (2009-11-27 10:29:00)
Quote: Originally Posted by Conradicles I see the 2.7 ohm Mundorf, but the other 2 are different values than 7.5 ohm. Does this mean that you just need to get close to the 15 ohm total when the 2 are added together? I believe so since Mundorf (or rather Madisound) didn't have the exact value. Sonicraft has the exact values of Mills.
user's latest post:
[FYI] Getting some glass for my...
Published (2009-11-27 01:34:00)
Well I have received two sets of tubes to run in my Grounded grid, and the China tubes sounded best. I am very upset about that. $10 tubes bested more expensive older tubes Well I hope the tube for my buffer comes in soon, and beats the chinese tube in there.
user's latest post:
DIY Project - Sub Design Plans...
Published (2009-11-24 21:38:00)
I was going to suggest cloning an LF14 ;-) http://www.polksda.com/pdfs/LF14Manual.pdf
user's latest post:
Looking for opinions on SDA-1C...
Published (2009-11-26 01:18:00)
Ok I dug into the speakers today and it looks like I've got the single board design. There's a sticker on the 12uf cap, reading "SDA 1C BE1618-A 4/22/88". Thought that was kind-of cool.
user's latest post:
Bipolar wiring
Published (2009-11-20 15:22:00)
Quote: Originally Posted by dudeinaroom if the crossover has the same crossover points as the donner for the driver and is * ohm your good, but if it is a crossover for 4 ohm driver you will have either a gap, or an over lap in the signals that are sent to the drivers. If it is a crossover that is 8 ohms and has a crossover point comparable to the original for the drivers you would just wire from the crossovers tweeter output + to the tweeter...
user's latest post:
DIY Budgetfile speaker cable's
Published (2009-11-24 02:00:00)
Quote: Originally Posted by GV#27 Trust me I'm not complaining about not getting to use it,just that usually by this time I have had to do some hard core shoveling,but now that I have the blower it doesn't snow.Thats fine by me. 2 years ago, NOT a single snowblower was available in September/October, I was in physio and for some reason every time I was coming back from it I was (my back) put to the test with nasty/hard snowbanks ....
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Latest active threads on DIY, Mods & Tweaks::
Started 11 hours, 52 minutes ago (2009-11-29 15:32:00)
by CoolJazz
H9,
The post hole size is usually, but not always the same. In addition, some use holes that are not round, but have flattened edges so the post has something to grip on and not rotate. Some others solve that with an extra protruding notch on one side. You could add a notch if needed but hard to add material back in to have the two flattened sides.
Another good place to look for ...
Started 14 hours, 54 minutes ago (2009-11-29 12:30:00)
by dudeinaroom
if the receiver is a surround sound receiver I would check the crossover settings. Also might want to double check the crossovers in the speakers and make sure all is hooked up to the right spots. I once wire a set up in a hurry, had all of my leads going to the crossover accidentally hooked the input leads to the woofer, and the input (from the amp) to the woofer input. I kept scratching my head...
Started 1 day, 2 hours ago (2009-11-29 00:46:00)
by Wardsweb
Update...
Over three years in the making, but I finally veneered my horns and my 2-channel rig has had a few changes. So, here it is in all it's glory.
Started 2 weeks, 2 days ago (2009-11-13 19:30:00)
by mshan242700
http://rivesaudio.com/resources/list...oom/frame.h tml
http://www.gikacoustics.com
Started 3 days, 12 hours ago (2009-11-26 15:15:00)
by disneyjoe7
Nice looking block of wood there, great looking start look forward when you
get them done.
Started 5 days, 16 hours ago (2009-11-24 10:28:00)
by Paden501
Ok so 2x 2.2uf gets me closer to the original. The tolerance on the ESAs is +- 3%, which for the 4.7uf is +-.141uf . for 2x 2.2uf the tolerance on each is +- .066uf, or a stack up of +- .132uf.
So I'll probably go with 2x 2.2uf caps.
So let me make sure I understand everybody correctly. I should remove and throw away the 750pf capacitor, not just leave it alone.? Correct?
...
Started 1 week ago (2009-11-23 00:53:00)
by GV#27
They look good,nice and tidy.May I ask where you purchased the Canare from
and price per ft.?
Started 6 days, 18 hours ago (2009-11-23 08:43:00)
by george daniel
Nice work again sir,,I would be interested in how you perceive the
performance/sound change. One thing,,what is the short piece of green wire
for?
Started 1 month, 1 week ago (2009-10-20 00:02:00)
by ben62670
Well the parts are on the way
Started 1 week, 4 days ago (2009-11-18 20:16:00)
by GV#27
If the Audiosource amp is operational you can check the DC voltages,or you can directly measure the AC voltage of the secondary output windings. The LM 3875 works best with a transformer secondary voltage in the 22-25 volts AC range.The final DC voltage should not exceed about 35 volts DC assuming an 8 ohm load,and it should be lower(max of approx.30VDC) if using a 4 ohm load.
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Hot threads for last week on DIY, Mods & Tweaks::
Started 1 day, 2 hours ago (2009-11-29 00:46:00)
by Wardsweb
Update...
Over three years in the making, but I finally veneered my horns and my 2-channel rig has had a few changes. So, here it is in all it's glory.
Started 5 days, 16 hours ago (2009-11-24 10:28:00)
by Paden501
Ok so 2x 2.2uf gets me closer to the original. The tolerance on the ESAs is +- 3%, which for the 4.7uf is +-.141uf . for 2x 2.2uf the tolerance on each is +- .066uf, or a stack up of +- .132uf.
So I'll probably go with 2x 2.2uf caps.
So let me make sure I understand everybody correctly. I should remove and throw away the 750pf capacitor, not just leave it alone.? Correct?
...
Started 1 week ago (2009-11-23 00:53:00)
by GV#27
They look good,nice and tidy.May I ask where you purchased the Canare from
and price per ft.?
Started 3 days, 14 hours ago (2009-11-26 13:10:00)
by leroyjr1
Nice setup you got there Jerry. How do they sound compared to your SDA's?
Which do you like better?
Started 3 days, 12 hours ago (2009-11-26 15:15:00)
by disneyjoe7
Nice looking block of wood there, great looking start look forward when you
get them done.
Started 1 week, 5 days ago (2009-11-17 21:33:00)
by concealer404
Can we have a poll?
HELL NO.
Started 1 week, 5 days ago (2009-11-17 05:03:00)
by kawizx9r
What's next....hmm
So, I'm not just satisfied with my setup.....I'm really happy about how it's come out! Tubes burned in, cables burned in, amp is fully modded, placement to me sounds right given the room size/shape, everything works so well together!
I've decided to put off the 'huge step up to a more respectable tubed preamp' and ...
Started 6 days, 18 hours ago (2009-11-23 08:43:00)
by george daniel
Nice work again sir,,I would be interested in how you perceive the
performance/sound change. One thing,,what is the short piece of green wire
for?
Started 1 week ago (2009-11-22 15:39:00)
by GV#27
Bagby has one,heres a tutorial. http://techtalk.parts-express.com/sh...d.php?t=209 863
Started 1 week, 4 days ago (2009-11-18 20:16:00)
by GV#27
If the Audiosource amp is operational you can check the DC voltages,or you can directly measure the AC voltage of the secondary output windings. The LM 3875 works best with a transformer secondary voltage in the 22-25 volts AC range.The final DC voltage should not exceed about 35 volts DC assuming an 8 ohm load,and it should be lower(max of approx.30VDC) if using a 4 ohm load.
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