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Problem with CCS for filaments
I'm trying on CCS for filament. Below is my simple schematic. I've got problem that I can hear vibration noise at quite high level in first 25-30 seconds. Filament voltage increases step by step. When...
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First set of speakers almost done!!
I've almost completed my first ever DIY project and I'm really enjoying the sound of these! The most impressive part was dropping the top speaker into the cab while playing music and hearing it go from...
View ArticleAlpair 10.2 Manufacturing run?
Hi Mark, I was wondering if you were going to do another Alpair 10.2/10.2A manufacturing run or if the 10.3 and 10P are intended to replace the 10.2? Looking forward to the new models! Thanks!
View ArticlePower supply when mains voltage in unstable
I just scored a pair of populated F5 boards, and am in the process of building the power supply for the amp (much more complicated than the amp boards themselves!! ah the pleasures of DIY) Over here in...
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ESp P3 amp on Cheap 150w amp board
Is the pcb for the 150 w amp suitable for esp P3 amp??? Ill be cutting the collector tracks and will put 220 ohm resistors in series with the collectors of Q1 and Q2 and bypass D1 R10 and R12. I have...
View Articlebase theory of self osc and sample circuit
i asking for base theory of self osc and if you dont mind please post sample circuit. regards.
View Article2sa1993 cross
Hello Group, I'm having a hard time sourcing a 2SA1993 transistor. Does anybody have one or a good number for a cross? Thanks Jim
View ArticleAdding 4 channels to a 2 channel input on HT amp
I got a bit into the Teac reference series recently, lovely amps. Anyway, I'm using a 500d at the mo for HT uses, fed from a PC and 6 channel analogue out from an Asus HDAV1.3 (any recommendations for...
View ArticleHeadless audio box
The hardware is around to do this very cheap at the moment with little power needed to actually play music. Wouldn't it be nice to get the matching cd deck from that old stereo and stick a little...
View ArticleHT Sound card
Was just wondering if there is a proper HT dedicated pcie sound card with analogue out, preferably rca's. Got the HDAV1.3 at the moment, and there is nothing really wrong with it, just a few features...
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Any DIY interest in this facted baffle that fits PE 0.5cF kit cabinets?
I am about to CNC cut this faceted baffle for a new Bamberg product. I am considering releasing some to the DIY community. This baffle will fit onto the Parts Express 0.5cF cabinet p/n 302-72x. As you...
View ArticleSquare Buttons for NAD-3020
Hi folks. I'm in search of four square buttons for my NAD-3020. Does anyone have a lead on such things, or in possession of a dead amp with some extra buttons handy? Many thanks from a new member....
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Need help troubleshooting clone amp
Hi. I bought some PCB's which are an adaptation of a Marantz MA9S2, but incorporate some custom changes(such as an op-amp-based DC servo), and utilizing multiple pairs ON-Semi 4218A/4302A with 62v...
View Articlewhat's good starting xover values for ~1K5 12PE32?
-got a 12PE32 in a little Karlson K12 topped with a Transylvania K-tube and choice of BMD440 or DE250 - a textbook Eminence "1K6" network isn't right has anyone here worked with 12PE32 in that region?
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Rockford Fosgate Prime R1000-1D
The power supply fets failed in this amp The driver for the fets also failed.. It is a 6 pin suface mount transistor Board Location Q7 which the Schematic says the part number is C2045E5 I cant find...
View ArticlePencil Tuning Tips
I have recently completed a pair of Pencil 7.3s and Pencil 10.2s. ALL of my previous builds were sealed cabinet designs. Stuffing and tuning those cabinets was easy. Stuffing the Pencils was, and...
View ArticleCapacitance of cardas cables for turntable rewire
Just to share a reply from Cardas Audio. Though not the best, looks like the Coax offers the lowest capacitance ( For those still using wanting to use the V15 III). MC 1 X 21.5 awg Coax 37.3 pF 33 awg...
View ArticleMinidigi vs Twisted Pear Metronome vs?
Need an ASRC to feed my minidsp @ 48KHZ*Seems there are at least 2 options, Minidigi or TP Metronome.I prefer to have a usb input which minidigi doesnt have.Any suggestions?*
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New F5 build: Speaker positive showing continuity w/ground
So Iam about to start up one channel of my F5, I am double checking everything and the speaker positive binding post is connected to ground when tested w/my meter. This is not good, right? I disconnect...
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Tube buffer with 6n3-EV
Hello people! Do this schemics can be used as a tube buffer for CD-player or required some changes to the schematics?:confused: thank you! Attached Images tube buffer_6n3.GIF (6.5 KB) Graff-1.GIF (18.6...
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