Roender's FC-100 prototype and builder's thread - Page 51 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 31st August 2012, 11:13 PM   #501
Luke is offline Luke  New Zealand
diyAudio Member
 
Join Date: Sep 2001
Location: Wellington NZ
Send a message via AIM to Luke
Hi Rudi, was the attenuator a kit, amp is looking good.
__________________
If you give a man a fish he will eat for a day. But if you teach a man to fish he will buy an ugly hat. And if you talk about fish to a starving man then you are a consultant. Dilbert
  Reply With Quote
Old 1st September 2012, 03:44 AM   #502
pooge is offline pooge  United States
diyAudio Member
 
Join Date: May 2003
Location: Northern Va.
Quote:
Originally Posted by Rudi_Ratlos View Post
I am currently going on and integrate a source selection / volume attenuation into my FC-100 case.

The selector/attenuator is based on BurrBrowns (TI) PGA2311 - chip, which is controlled by a PIC 16F4550 µProcessor.
I prefer this solution to an ALPS-DualPotentiometer, to the Lightspeed-Attenuator, ..., and:
everything is controlled remotely by means of Infrared.
It's your amp, but I would prefer keeping RF generators outside of my amp.
  Reply With Quote
Old 3rd September 2012, 05:02 PM   #503
evette is offline evette  Canada
diyAudio Member
 
Join Date: Jun 2006
Send a message via Yahoo to evette
Rudi Hi, Isn,t it time for the second round group buy. ERvette
  Reply With Quote
Old 4th September 2012, 11:23 AM   #504
diyAudio Member
 
Rudi_Ratlos's Avatar
 
Join Date: Jun 2009
Location: Hamburg / Germany
I "married" the analog and digital sections of my FC-100 build this morning.
Everything works as designed - and can be controlled completely by means of infrared from my armchair.

I will go on and order some ALU-plates and - brackets to encapsulate the transformers and to have a base for the "second-floor digital PCBs".

@POOGE: I talked to the one, who designed the digital PCBs (German electronic engineer) and told him about my worries concerning RF-emission.
His answer: "Don't worry at all."

@Joseph: Sir, , I am currently busy doing a group-buy for my SYMASYM-PCBs.
Maybe that I have to translate the builder's manual into English, which will take me a lot of time.
Currently I have no time to start a second round of group-buy for the FC-100, allthough the FC-100 is worth is, definitely! Maybe later!

Best regards - Rudi
Attached Images
File Type: jpg FC-100 009.jpg (284.1 KB, 628 views)

Last edited by Rudi_Ratlos; 4th September 2012 at 11:28 AM.
  Reply With Quote
Old 4th September 2012, 11:37 AM   #505
diyAudio Member
 
Join Date: Nov 2011
Location: Lexington, Kentucky
Default Thermaltrak

Quote:
Originally Posted by Rudi_Ratlos View Post
Currently I have no time to start a second round of group-buy for the FC-100, allthough the FC-100 is worth is, definitely! Maybe later!
In the meantime folks can build dado's Thermaltrak+TMC amp. The single side PCBs and schematics are all available to etch at home. I made one and it sounds fantastic!
  Reply With Quote
Old 4th September 2012, 12:16 PM   #506
dadod is offline dadod  Croatia
diyAudio Member
 
dadod's Avatar
 
Join Date: Apr 2006
Location: Zagreb
Quote:
Originally Posted by greenm01 View Post
In the meantime folks can build dado's Thermaltrak+TMC amp. The single side PCBs and schematics are all available to etch at home. I made one and it sounds fantastic!
And you need two pairs of the TT transistors only, for good thermal stability.
dado
  Reply With Quote
Old 5th September 2012, 09:31 AM   #507
diyAudio Member
 
Rudi_Ratlos's Avatar
 
Join Date: Jun 2009
Location: Hamburg / Germany
@Greenm01, DADOD,

Gentlemen: I appreciate your interest in the progress of my FC-100 build very much.
From all I heared from those ones, who have already finished their FC-100 build, this is definitely a 1st - class amplifier.
You are right with this, Greenm01.

But I do not recommend you , to etch the PCBs by yourself.
My layout is double-sided with plated-through holes and VIAs, to guarantee short tracks and minimal crosstalk, and I think that it is too hard
to etch without professional equipment.
I will send you, Greenm01, PDF-files of the top- and bottom-layer of my layout, if you want to etch it by yourself nevertheless.

@DADOD: the thermal compensation, which uses 5 integrated ThermalTrak diodes of the NJL0 transistors, is a proven design.
Please refer to "Douglas Self, Audio Power Amplifier Design Handbook, 5th Edition, Figure 15.27" for further analysis.

As I have told you in my previous post, I am currently too busy with another project to open a new round of group-buy for the FC-100.
I have put down your names into the interested party-list and will inform you both, when I start a new round.

I am sure that you will be very happy with the FC-100.

Best regards - Rudi_Ratlos
  Reply With Quote
Old 5th September 2012, 10:46 AM   #508
diyAudio Member
 
Join Date: Nov 2011
Location: Lexington, Kentucky
Default Thermaltrak+TMC

@Rudi_Ratlos

Your PCB design looks very nice and I'm sure that the FC-100 sounds excellent.

Alternatively, Dadod's Thermaltrak amplifier is available with a single side PCB that may be etched (or made with a home CNC machine) @ home for those who're interested in building a proven amplifier in the near term. I've etched a few PCBs using the photo-resist method and they come out wonderfully.

It's unfortunate that the FC-100 PCB is not available for everyone to build at their leisure. In the future if someone wants to build the amplifier outside of a group buy they will be out of luck. The advantage of a single side board is that one may etch the board themselves without having to spend an excessive amount on PCB manufacturing, or be lucky enough to be included in a group buy.

Please do not include me in the FC-100 group buy. I'm very happy with my hand crafted Thermaltrak+TMC amp :-) The sonics are outstanding and if I ever need another Class AB amp I will definitely build another one.
  Reply With Quote
Old 5th September 2012, 01:03 PM   #509
diyAudio Member
 
Rudi_Ratlos's Avatar
 
Join Date: Jun 2009
Location: Hamburg / Germany
@Greenm01, you are missing a unique chance, if you do not build the FC-100.
But please: this is the "Roender's FC-100 prototype and builder's thread". Stop talking / posting about your favourite DIY-amplifier,
which seems not to be the FC-100.

Dear FC-100 friends,

since yesterday I have been listening to my FC-100 build.
Let me give you my first listening impressions.

As source I am using a CD-Player Technics SL-PG470A; currently I have connected a pair of Behringer B 2031P Truth speakers.

I will not use any stereotyped phrases like: "deep, black bass, beautiful trebble, ...".
I want to describe the character of the FC-100 (as I hear it) by comparing its sound to how a man walks.

I have a chip-amplifier. It plays like: slow, sometimes stumbling, ..., well: finally it reaches the end of a music track. Is this, how an old man walks?

My SYMASYM: very fast, it seems to run through a piece of music, you feel the efforts it undertakes to do it right, you hear the sweat,
running down its face, it is doing its best, which is very good!
I see a man, middle-aged, in good shape.

Then the FC-100: you see a youth in front of you, having all the strength of the world, walking with a sexy kind of leisure,
swaying with his hips, tossing his hair, flirting with you, reproducing the music "by the way", "like a duck takes to water".
(I found this phrase in my dictionary. Is it well known?).

I was and still am very impressed by the "easy-going" way, with which the FC-100 plays my music. This is, what I have been looking for.
By the way: the FC-100's sonics are the best that you can imagine.

Best regards - Rudi_Ratlos

P.S. I will upgrade my speakers and use another source soon.
Attached Images
File Type: jpg FC-100 017.jpg (342.1 KB, 561 views)

Last edited by Rudi_Ratlos; 5th September 2012 at 01:05 PM.
  Reply With Quote
Old 5th September 2012, 01:06 PM   #510
diyAudio Member
 
metal's Avatar
 
Join Date: Jan 2004
Quote:
Originally Posted by greenm01 View Post
@Rudi_Ratlos

Your PCB design looks very nice and I'm sure that the FC-100 sounds excellent.

Alternatively, Dadod's Thermaltrak amplifier is available with a single side PCB that may be etched (or made with a home CNC machine) @ home for those who're interested in building a proven amplifier in the near term. I've etched a few PCBs using the photo-resist method and they come out wonderfully.

It's unfortunate that the FC-100 PCB is not available for everyone to build at their leisure. In the future if someone wants to build the amplifier outside of a group buy they will be out of luck. The advantage of a single side board is that one may etch the board themselves without having to spend an excessive amount on PCB manufacturing, or be lucky enough to be included in a group buy.

Please do not include me in the FC-100 group buy. I'm very happy with my hand crafted Thermaltrak+TMC amp :-) The sonics are outstanding and if I ever need another Class AB amp I will definitely build another one.
useless pointless post. Are you making commercials for other amplifiers in this thread? This is not welcome, hence go back to your original threads and post there. In few words, F * * K OFF ... We don't want troubles...

Last edited by metal; 5th September 2012 at 01:12 PM.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 08:33 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2