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View ArticleAikido preamp power supply
Hi, I am building Aikido preamp and I red many reviews and posts regarding the power supply which, most of project builders have used solid state designs. I found this complete module in ebay, can...
View ArticleBuffering two signals together
First of all, hi everyone. :D I've used this forum a lot to look for useful info, now i decided it's time to actively participate. I'm still quite a noob to electronics, though i'm handy with a...
View ArticleReplacing Hitachi 222 scope
I've had a Hitachi 222 for slightly over 30 years. Some days it just won't make a screen. Can't tell if it's the trigger circuit or HV. As much as I don't want to, it may have to get replaced. Having...
View ArticleReel loud tape hiss
Hi I bought a Sony TC-558 reel to reel tape deck at a thrift store, it's in excellent condition and all functions are good except the significant amount of tape hiss. I cleaned the heads and I am using...
View Articleev7300 not putting out
hey everyone im new here and have a question for anyone in the know I have an old ev 7300 amp its in a rack with 3 bgw amps and I have not used it for about 7 years the bgws work fine but I have not...
View Article8 Ohm 2X12 Guitar Speaker cabinet - 2X4 Ohms in series or 2X16 Ohms in parallel?
Hi Gang! Can't seem to find anything that says which would perform better or benefits vs cons, for either a 2X4 Ohm in series, or 2X16 Ohm in parallel, for an 8 Ohm 2X12 speaker cabinet for a guitar...
View ArticleDB CROMO400+ repair reset
AEB Industriale PST424-r.1.0 info@dbtechnologies-aeb.com DGpack400-1.0 PST427-TOP TDA8950TH X2 24LC64 x1 ADAU1701 dsp X1 JRC4580 X3 C04R 8 pin X1 :confused: I have the speaker and datasheets as the...
View ArticleCristi is very honest!
Last year I paid Cristi over $600 for a bunch of amp modules and SMPS. I didn't take delivery because I was waiting for new versions of both. I got a new assignment at work and no longer have time to...
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Mystery 'sj74'? jfets
Hi All - I bought a pack of 10 "sj74"'s recently from China, with a limited expectation of getting real parts. I've a Mini Aleph-J I'm halfway through building and getting appropriate jfets is proving...
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Hifonics HFI1000D Class D Mono Amplifier
I took this amp out of my vehicle after having it in there for about six months. I am only selling because I am taking the entire system (subs, amp, wires, head unit) out of my vehicle. Selling for...
View ArticleHow to check wether a new headphone is a fake or not?
I just bought a Dr Dre headphone from this site:www.beatsofficiel.com. I don't know wether it is a fake or not.Is there anyone having bought things from this store?
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Transformer
WHo has information about this transformer Bicron Toroidal P/N AU375 NB Rating 900 VA Cooky Attached Images Trafo.jpg (6.7 KB)
View Article6F6G In SE
Anyone tried 6F6G's on their SE amp? Can I use it with Zs=5K ohms and Rk=560 ohms? Thanks! Abe
View Articlefilter Q Question
Hello. I have started to model an active filter design using Boxsim to sim the acoustic output and i have arrived at a 5 pole lowpass and 4pole highpass for my loudspeakers. I have used each 2order...
View ArticleTannoy System 800 "rattling"
Hey guys. So, the problem is that whenever I play som bass heavy tunes, one of the woffers starts to rattle. I seems like its rubbing against the tweeter horn! Any ideas? /Thomas
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Which OB baffle shape?
Before I bust out the saw, last minute wonderings which of these baffle shapes make better sense sonically (and which might look nicer)? Lower mid is dipole 12", upper mid is dipole TPL-150H and...
View ArticleLabhorn
Hi, i know this topic have been up a couple of time, but i just couldn't find the information i needed. I'm going to build 2 of these. and later build an additionally two. i've been looking at the two...
View ArticleBuilding a Baby Huey EL84 amp - might need some pointers
Hi guys, I'm planning a build of a Baby Huey EL84 amp, but have gotten stuck on a few things. I didn't want to clutter up the main thread with silly questions, so I decided to make my own. I hope...
View ArticleSelecting rectifier diodes for high frequency or SMPS supplies?
What attributes and/or parameters are necessary for the rectifying diodes on the secondary of an SMPS? Can some of these parameters be relaxed if the switching frequency is low, say below 100kHz? or...
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