Differential probe recommendations
I am looking for an active differential probe for my Rigol DS1052E. The usual name brand probes list for more than the price of my scope! Are there any lesser known brands that work well and don't...
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My boozehound phono stage build
Pretty straight forward. Good documentation, well packaged kit, and good support (I had swapped the power and ground connections.) It's powered by 18 rechargeable AA batteries (in the penguin tin) and...
View ArticleCounterpoint SA-1000 Hum in left channel Pinging Anatech!
I have a hum in the left channel of my Counteroint SA-1000 preamp. now before I start I have tried all the tricks to narrow it down with no great success. I fully upgraded this preamp a few years ago...
View Articlewhat is this amp really - "Digitech" AS-0476
Hi All I recently picked up for peanuts a power amp described as a "Digitech" AA-0476. No time to have test driven it yet....but am expecting it to be rubbish... The case is very soild any probably...
View ArticleSony XM-SD51X
This amplifier appears to use the MTX style of power supply. With the rectifiers removed here is what I measure IC 6 = 494 1: 5.4mV 2: 4.79V 3: 62.8mV 4: 4.96V 5: 1.677V 6: 3.511V 7: .4mV 8: 14.35V 9:...
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My first crossover design (yes I've measured things - even phase) Bessel?
I really only understand the basics of crossover design but I'd love to learn. I've got my measurements in via Room EQ Wizard. I don't have a measurement microphone yet (it's on the purchase list for...
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FS: two 500W subwoofer plate amps built for NHT by Sunfire (CA,USA)
Up for sale are two NHT VT3 plate amps. I originally bought these from Jack Hidley but I haven't put them to use. They were built by Sunfire for NHT and are still in the OEM plastic wrapper. I have all...
View ArticleBehringer Xenyx 802, looking for schematic
Got one of these with a dead channel. Found U15 bad, but I would like a schematic if I can find one. All I've been able to get is the 502 schematic, which has a bit different layout.
View ArticleXonar STX and JRC Muses Opamps
First off please forgive my ignorance I am a complete newbie when it comes to the audiophile world. I have just purchased the Asus Xonar Essence STX and being someone who loves to tinker with just...
View ArticleAre EF86 Tubes inherently microphonic?
I have been experimenting with some SET Audio Amps and a couple of guitar amps that use EF86s and noticed that these tubes all seem to be inherently microphonic. I have rolled NOS Phillips, Telefunken,...
View ArticleKENWOOD KAC 7252 CAR AMP
Hello Everyone, My Car amp on powering on the red light glows for a sec or two and then goes into protect, can some one be kind enough to guide me throught the repair of this amp. Thanks in Advance:)
View ArticleMCM 55-2982 T/S Params and a Ghetto System
Hi All With my recent frustration with drivers that weren't really suitable for what I wanted I realized that my lack of experience was hampering my ability to make good decisions. So, I've decided to...
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FS: Adire Audio 15" Brahma
For Sale: Adire Audio 15" Brahma 15D4 Unused in good condition $175 plus shipping from 98177 Attached Images Brahma 15D4 001.jpg (824.4 KB) Brahma 15D4 002.jpg (941.7 KB) Brahma 15D4 003.jpg (901.5 KB)...
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FS: Relay based stepped attenuator
Hi there! I want to sell these 3 stepped attenuators I made, I need to support my other projects. These are made for any DIY amplifier projects to replace standard potentiometers. There is only 3...
View ArticleCould someone help me identify this crystal?
I just opened up my focusrite scarlett 2i2 to see if there was anything I could do to improve it. The board is mostly smd so I think I am going to leave it alone. There are a few caps I could upgrade...
View ArticleRocker Switch Wiring
I have a SPST rocker switch with LED. It has 4 pins, 1,2,+ and - for the LED. How would I wire this for my tube amp?
View Articlerockford fosgate T1500-bd
rockford T1500-Bd Just got one of these and and reading 79 volts on the speaker terminals. Unit powers up fine wiht power light no protect light. Checked the output fets and they are okay. Drive...
View ArticleGuess the album title
I got his idea perusing an audio only forum. I thought I'd try it out here. (If anyone wants the link to either the forum or the thread, I'll post it). Please excuse me if this has already been done....
View ArticleDoes an Op Amp Voltage Follower Operate in Class A?
Since my sources are all high level, I plan on building a preamp using an op amp in voltage follower mode. I know that when operating such a device with a gain of more than 1, the output will be in...
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