Go Back   Home > Forums > Blogs

Old

Amp Camp Amp Build Instructions

Posted 8th October 2012 at 06:10 PM by N Brock
Updated 26th October 2012 at 07:36 PM by N Brock (added link)

http://www.diyaudio.com/forums/diyau...ild-guide.html

Here is the link for the actual build guide.
Attached Thumbnails
Click image for larger version

Name:	1 full kit.JPG
Views:	32612
Size:	255.1 KB
ID:	753   Click image for larger version

Name:	2 board list.JPG
Views:	31825
Size:	259.5 KB
ID:	754   Click image for larger version

Name:	3 R strip.JPG
Views:	30223
Size:	290.2 KB
ID:	755   Click image for larger version

Name:	4 R bend.JPG
Views:	29956
Size:	197.9 KB
ID:	756   Click image for larger version

Name:	5 R insert.JPG
Views:	30297
Size:	218.2 KB
ID:	757  

Click image for larger version

Name:	6 R clip.JPG
Views:	31231
Size:	212.4 KB
ID:	758   Click image for larger version

Name:	7 multi R.JPG
Views:	29906
Size:	222.9 KB
ID:	759   Click image for larger version

Name:	8 all R.JPG
Views:	32179
Size:	245.9 KB
ID:	760   Click image for larger version

Name:	9 power R.JPG
Views:	29877
Size:	215.2 KB
ID:	761   Click image for larger version

Name:	10 P1.JPG
Views:	31595
Size:	241.8 KB
ID:	762  

N Brock's Avatar
diyAudio Member
Posted in Uncategorized
Views 2018 Comments 0 N Brock is offline
Old

fs2

Posted 8th October 2012 at 06:09 PM by N Brock

fs2
Attached Thumbnails
Click image for larger version

Name:	11 close.JPG
Views:	29919
Size:	179.9 KB
ID:	763   Click image for larger version

Name:	12 ZTX450.JPG
Views:	29648
Size:	172.1 KB
ID:	764   Click image for larger version

Name:	13 LSK170.JPG
Views:	29520
Size:	175.5 KB
ID:	765   Click image for larger version

Name:	14 all but C1.JPG
Views:	29566
Size:	234.3 KB
ID:	766   Click image for larger version

Name:	15 complete board.JPG
Views:	29458
Size:	255.4 KB
ID:	767  

Click image for larger version

Name:	16 xtr hardware.JPG
Views:	29468
Size:	176.6 KB
ID:	768   Click image for larger version

Name:	17 xtr bend.JPG
Views:	29415
Size:	143.5 KB
ID:	769   Click image for larger version

Name:	18 micas.JPG
Views:	165
Size:	193.8 KB
ID:	770   Click image for larger version

Name:	19 apply grease.JPG
Views:	29332
Size:	188.1 KB
ID:	771   Click image for larger version

Name:	20 place mica.JPG
Views:	29327
Size:	175.7 KB
ID:	772  

N Brock's Avatar
diyAudio Member
Posted in Uncategorized
Views 787 Comments 0 N Brock is offline
Old

fs3

Posted 8th October 2012 at 06:09 PM by N Brock

fs3
Attached Thumbnails
Click image for larger version

Name:	21 place xtrs.JPG
Views:	29259
Size:	183.6 KB
ID:	773   Click image for larger version

Name:	22 under washer.JPG
Views:	29282
Size:	212.0 KB
ID:	774   Click image for larger version

Name:	23 bolted down.JPG
Views:	29417
Size:	230.7 KB
ID:	775   Click image for larger version

Name:	24 in wires.JPG
Views:	29168
Size:	189.6 KB
ID:	776   Click image for larger version

Name:	25 in soldered.JPG
Views:	29498
Size:	240.2 KB
ID:	777  

Click image for larger version

Name:	26 out soldered.JPG
Views:	29691
Size:	241.7 KB
ID:	778   Click image for larger version

Name:	27 LED done.JPG
Views:	29172
Size:	250.6 KB
ID:	779   Click image for larger version

Name:	28 power.JPG
Views:	29479
Size:	217.3 KB
ID:	780   Click image for larger version

Name:	29 power deet 1.JPG
Views:	29265
Size:	202.4 KB
ID:	781   Click image for larger version

Name:	30 power deet 2.JPG
Views:	29089
Size:	246.5 KB
ID:	782  

N Brock's Avatar
diyAudio Member
Posted in Uncategorized
Views 703 Comments 0 N Brock is offline
Old

fs4

Posted 8th October 2012 at 06:07 PM by N Brock

fs4
Attached Thumbnails
Click image for larger version

Name:	31 power deet 3.JPG
Views:	29171
Size:	190.4 KB
ID:	783   Click image for larger version

Name:	32 testing.JPG
Views:	30835
Size:	243.9 KB
ID:	784   Click image for larger version

Name:	33 Enjoy.JPG
Views:	33118
Size:	247.3 KB
ID:	785  
N Brock's Avatar
diyAudio Member
Posted in Uncategorized
Views 512 Comments 0 N Brock is offline
Old

Tube amp progress

Posted 21st September 2012 at 03:19 AM by wlowes

In the past few weeks I have made progress on by OTL amps. The wooden bases are finished, and I am very happy with the finish.

I reformed and tested all the big can caps. The Nippon Chemi Caps are fine. The big old Samgmo caps make me too nervous to consider using them. They may be serviceable, but have a high leakage current compared to the Nippons and do not seem to hold a charge. Perhaps I'll use them in some other project. I will buy 2 x 2200 caps for each rail. 4 per mono and 8 in total. This caused yet another redesign of the top plate. I have now got room to place a big heat sink on top. It will disipate heat from bridge rectifiers and big resistors used for soft start.

Finally I started to build. While all point to point wired, the amps will be modular. I am using wood blocks as the base for each power supply circuit. I laid out the supply for the small tube anodes and wired them up. This way the caps are well supported and vibration damped....
Attached Thumbnails
Click image for larger version

Name:	Small tube anode power modules - building.jpg
Views:	1038
Size:	469.6 KB
ID:	743   Click image for larger version

Name:	Small tube anode power modules - scale.jpg
Views:	944
Size:	245.4 KB
ID:	744  
wlowes's Avatar
diyAudio Member
Posted in Uncategorized
Views 935 Comments 0 wlowes is offline
Old

My 6c33c OTL project

Posted 21st September 2012 at 03:03 AM by wlowes

I am starting this blog to create a record of my first tube amp project. The project is to build a pair of 110W 6c33c OTL monoblocks based on Bruce Rosenblit's patent. I am starting the blog at the stage that I am well into the project. I started planning and collecting parts well over a year ago and am at the stage where execution is under way.

So how did I end up with this choice? My DIY audio experience got under way with a Peter Daniel chip amp which I enjoy to this day. Along the way I discovered the Lampizator site leading to the creation of a 1541A DAC with 6np2 tube output. When this sprang to life I was hooked on the idea of building a tube amp. I have never actually heard a tube amp. The look is very fundamental. I want to experience the additional nuances in the music reported by tube amp fans.

I wanted to start with something simple but good quality for my first project. I also wanted to keep costs in check. I figured that good quality...
Attached Thumbnails
Click image for larger version

Name:	6c33c walnut base 1.jpg
Views:	814
Size:	128.1 KB
ID:	740   Click image for larger version

Name:	6c33c walnut base 2.jpg
Views:	2334
Size:	176.3 KB
ID:	741   Click image for larger version

Name:	6c33c walnut base construction.jpg
Views:	2328
Size:	226.5 KB
ID:	742  
wlowes's Avatar
diyAudio Member
Posted in Uncategorized
Views 3221 Comments 1 wlowes is offline
Old

Akihabara, lost to the maids.

Posted 20th September 2012 at 11:51 PM by rjm (RJM Audio Blog)
Updated 23rd September 2012 at 11:24 PM by rjm

A maid cafe is, as far as I can make out - and wikipedia confirms - a cafe/light restaurant staffed by girls who dress up as anime characters or doll-like maid costumes. Chatting with customers is encouraged, so the atmosphere is more social than a regular cafe. Its also more expensive, and the food worse. (from what I can judge from the menus: its what my nine year old daughter might make if left alone in the kitchen...) They advertise by by having the staff stand around - in costume - on busy street corners nearby handing out small cards.

This is a phenomena that started about 5-6 years ago, or at least started to go mainstream then. Ground zero for maid cafes is the "nerd districts" where computers, comic books, and video games were sold: Akihabara in Tokyo, Nipponbashi in Osaka.

Growth appears to be exponential: every time I visit either region (I'm in Tokyo right now, staying near Akihabara) the number of maid cafes (and therefore maids on the street)...
rjm's Avatar
rjm
diyAudio Member
Views 1519 Comments 3 rjm is offline
Old

Finally packaged up "new" ADAU1442 DSP

Posted 2nd September 2012 at 08:11 AM by googlyone
Updated 15th September 2012 at 08:10 AM by googlyone

Wow - it has taken me months to finally get around to packaging up my latest DSP. With work, travel and holidays I have a huge bag of excuses, but I guess the actual reason is that my old DSP using the Analog Devices AD1940 actually works just fine.

The results are I think pretty neat:

Click image for larger version

Name:	ADAU1442_small_front.jpg
Views:	946
Size:	231.8 KB
ID:	737

The case was made from leftover bits from the last set I built - the sides are simply timber with a groove routed for the top and bottom panels to sit in, and the front and rear panels screw into the timber sides. It makes a change from the multitude of "all metal" cases that litter my workroom and playroom.

The implementation here has one analogue to digital converter and four digital to analogue converter cards.

These can be seen here:

Click image for larger version

Name:	DAC_Section.jpg
Views:	765
Size:	289.1 KB
ID:	739

Where the ADC is the first vertically mounted bard on the left with the slightly scruffy IDC cable. The four DACS...
Attached Thumbnails
Click image for larger version

Name:	ADAU14442_small1.jpg
Views:	767
Size:	873.5 KB
ID:	738  
diyAudio Member
Posted in Uncategorized
Views 2067 Comments 1 googlyone is offline
Old

NXP's innovation in smart phone sound - any implication for the high-end?

Posted 2nd August 2012 at 05:13 AM by abraxalito

EET seems to be on a run of interesting articles of late - and here's the latest, about NXP's latest digital amp for smartphone speakers:

Achieving loud, rich sound from micro speakers

So yeah, smartphones are a long way from the high-end you say, so why talk about this at all? Well one sentence at the end caused me to pause and wonder how long before this kind of technology gets used where sound quality (rather than quantity) is paramount. I quote:

This leap in performance illustrates an important design trend. The days of stand-alone amplifiers and converters designed in isolation have gone.

The writer has put his finger on a major reason why the high-end of audio is a relatively stagnant pool for innovation. Pretty much everything's designed in isolation - players, amps, speakers. What if those days really are coming to an end, not just in smartphones but in quality audio too? Smartphones have the volume so there's economic...
abraxalito's Avatar
diyAudio Member
Views 1880 Comments 7 abraxalito is offline
Old

Cirrus now Apple's poodle

Posted 1st August 2012 at 04:53 AM by abraxalito

Cirrus (familiar to us in the audio world as a major ADC/DAC and codec supplier, formerly Crystal Semiconductor) has engineered itself into a tight corner by having over half its sales come from Apple - but its not permitted to mention its largest customer by name due to Apple's draconian NDA.

I wouldn't say things are looking very bright for Cirrus - to be that dependent on one single customer who is that much more powerful than you and a known corporate bully strikes me as poor strategic thinking.

Apple captive Cirrus gagged
abraxalito's Avatar
diyAudio Member
Views 1089 Comments 2 abraxalito is offline

New To Site? Need Help?
Copyright 1999-2017 diyAudio