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Doppenberg Dipole horn
Anyone seen this?: http://forum.bd-design.nl/index.php?id=17004 looks good & combines the least efficient with the most efficient; wonder what the lack of a back chamber does to the reactance...
View ArticleA little confused
I have been itching to build an active speaker for some time now and I was looking at 2 amp models on ebay. LME49810 Top Audio Power Amplifier Kit Board Mono 300W | eBay Stereo HiFi Two Channel...
View Article20 watt valve amplifier for sale.
Details at: http://www.ckp-railways.talktalk.net/20wattvalveamp.htm
View ArticleMulti-channel 3W amp for cheap? (Beginner with general questions)
I'm looking to build an amp with about 16 channels for cheap. Good news is that I only need roughly 3watts power into 4ohm speakers from it. I have never built an amp before, but I do know the basics...
View Articlehow to manage psu for the car amplifier? with 5200 1943?
I want to build a car amplifier and was stuck at the power supply where the supply is just 12v so how to make a psu for a car amplifier where I would be using lme49810 and 5200 1943 pair...
View ArticleQUAD34 PARTS
I need 2 potentiometers and 3 knobs for a QUAD34 unit. Does somebody know a supplyer ? Or somebody have a wreck unit I could by for parts.
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Hypothetical Stepped Baffles
This is just a "for the heck of it" conversation, so don't bother asking what I'm trying to build. ;) Let's say you're designing the woofer and mid (cones) part of 3-way, and you want to align acoustic...
View Article7A5 is a good driver for the 300B ?
Friends I have a lot of 7A5 tubes and I like of this pentode sound. This tube is sufficient for driver one 300B in single ended mode ? My idea is use 150V in the plate and screen. This tube work with...
View ArticleB-Day greetings to PaPa Pass
A few weeks ago I had a milestone (to me at least) 55th Birthday. Witch reminds me of another person having a B-Day in a couple weeks. Happy B-Day Bud :cool: Wish I could do more...
View ArticleTDA2009 input noise?
Hello, This is my second shot on a chip amp, the first one was TDA2050 which worked really well. I have some simple pc speakers with a dead amp lying around and thought about doing this 2x10W simple...
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Is my Home Ohm free ??
Here's one that is baffling me. The original problem was that when I tried to build a multiplexed LED display the LEDs were too dim to be visible under normal lighting. Here is a little test circuit...
View ArticleAftermarket balance control for my integrated
Is it possible to incorporate an aftermarket balance control to my Sugden A21Se integrated. My system images to the left because, I believe, of my room or maybe even my hearing and it seems the easiest...
View ArticleUsing Excel "Solver" for MOSFET SPICE params
Motivated by Pierre Touzelet's 2007 AX article for deriving Triode params with Microsoft Excel, I made a video showing how to use "Graph Grabber" and "Solver" to create basic, level 1 spice params for...
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Anyone know what these caps are for?
Below is the schematic for a Cohen mic preamp. I wondered if anyone knew the purpose of the 0.75p caps parallel to two of the 2k resistors. I'm a bit mystified myself. Thanks.
View ArticleService manual of NIKKO preamp beta ii
hello! anyone has the schematics of the NIKKO preamp beta ii? i've been searching in alot of places including google image (but it's not clear enough when ramped up the size) and ebay (i'm not staying...
View ArticleONSEMI'S MJ15023G + MJ15023G
Replacement output trannies for many Japanese transistors that are no longer in market. 5 each 10 total $35.00 shipped anywhere in the 48 US states USPS service.
View ArticleONSEMI'S MJ21193G AND MJ21194G
5 each 10 total brand new nice replacements for older Toshibas/Sankens. etc. $35.00 shipped anywhere in the 48 states.
View ArticleAccuton 3 way: Accu3
Here's my latest Accuton project. I've posted this over on HTguide.com and PE Techtalk, but I think the "crowd" over here is different enough to warrant cross posting. Apologies in advance to those who...
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FS:TAD 4001 (original Be diaphragms)
A pair of very fine mid/high compression driver. Excellent condition. Bought from TAD enthusiast out his own collection in USA. Carefully used, close serial numbers of B11682 and B11668. Be diaphragms....
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