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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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 Posted: Sat Feb 23, 2008 12:54 pm Post subject:
Re: 5W resistor |
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| jaidee wrote: | How critical is the value of the 5W resistor?
120R is not readily available in the UK.
If it is possible to substitute a different value, which is better 100R or 150%?
Incidentally, RS Components do a nice PCB mounting MES E10 lamp holder with pins to go straight into the PCB rather than tags, Part no.171-2580, very modest cost but there is a minumum order number of 10. |
I don't expect it to be overly critical.
My advice:
Buy a 150R 5 Watt
and a 560R 2 Watt
and connect them in parallel.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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goodrevdoc
Joined: Sep 11, 2006
Posts: 288
Location: Philadelphia, PA
Audio files: 1
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| Posted: Sat Feb 23, 2008 7:48 pm Post subject:
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Here are some Mouser part #'s for some stuff,
Heatsinks:
532-575002B00
120 ohm 5W resistor:
71-CW5-120
Relay:
655-V23105A5403A201
Fuse Holders:
534-3527
Fuses:
576-0239.200HXP
Here is a 6.3V 150mA screw type lamp that i plan to try, along with base,
Lamp:
606-CM40
Holder:
35LH010
A few questions. On the heatsink, the thermal resistance of the one listed above is 13.6 deg C/W. Is this adequate? This number is lower than the one spec'd in the BOM, but I seem to remember a lower number being "better".
-justin |
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stegoman
Joined: Oct 05, 2007
Posts: 21
Location: Chatsworth, California, USA
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| Posted: Sat Feb 23, 2008 8:04 pm Post subject:
Re: 5W resistor |
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| jaidee wrote: | How critical is the value of the 5W resistor?
120R is not readily available in the UK.
If it is possible to substitute a different value, which is better 100R or 150%?
Incidentally, RS Components do a nice PCB mounting MES E10 lamp holder with pins to go straight into the PCB rather than tags, Part no.171-2580, very modest cost but there is a minimum order number of 10. |
Could you put up the actual link to the item? Also, since there is an attempt to get a USA group order up and running, it would be advantageous if we could get both the lamps and sockets from the same place. It would probably reduce the total shipping costs. |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Sun Feb 24, 2008 6:11 am Post subject:
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| goodrevdoc wrote: |
A few questions. On the heatsink, the thermal resistance of the one listed above is 13.6 deg C/W. Is this adequate? This number is lower than the one spec'd in the BOM, but I seem to remember a lower number being "better".
-justin |
Lower is better. It's a (thermal) resistance, with the difference of temperature being the equivalent of a voltage, and the energy flow (=power dissipation) being the equivalent of a current.
Power ("current") is a given;
Temperature difference ("voltage") is lower for a lower (thermal) resistance.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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23isgood
Joined: Nov 18, 2006
Posts: 236
Location: San Francisco, CA bay area
Audio files: 13
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| Posted: Sun Feb 24, 2008 1:36 pm Post subject:
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The BOM calls for 741 op amps, could tl071's be used, or any other single op amp? I ordered the lamps from the link that was posted earlier. Thanks for the Mouser part numbers too!
pete
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Sun Feb 24, 2008 1:59 pm Post subject:
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| 23isgood wrote: | The BOM calls for 741 op amps, could tl071's be used, or any other single op amp?
pete |
TL071's can absolutely not be used.
You may find other opams that work, and I even have provided pads for bypass caps beneath each IC footprint for such experiments.
Here's some requirements for the opamps:
(1) Must work on heavy capacitive load.
(2) Must not have phase reversal when common mode range is exceeded.
(3) Must not do any other crazy stuff outside common mode range.
TL071 fails on (1) and (2).
I've seen expensive "audio" opamps that are advertised for not doing (2), but oscillate instead (3). (They wil work fine in many, many other circuits, but not here!)
IMO, the only reason to try other opamps than the 741 is to find out how it sounds without slew limiting. (Which means nothing else than the circuit distorts earlier for high frequencies than for low and midrange frequencies.) That kind of behaviour is part of the original Schulte Compact A - that's why I specified 741 opamps.
Some may want to try it without this behaviour - that's why I privided pads for bypass caps.
So, my recommndation:
Either go for 741 chips, or experiment with others, and post your results!
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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hachiman
Joined: Dec 24, 2006
Posts: 56
Location: easterneur
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| Posted: Sun Feb 24, 2008 3:27 pm Post subject:
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what about all the different 741 breeds ? like uA and the rest... I can obtain several vintage age 1980 uA 741s...
BTW Jürgen I sent you IBAN on thursday, deposit happened on friday actually , the 2x set .
Last edited by hachiman on Mon Feb 25, 2008 3:07 pm; edited 1 time in total |
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TheAncientOne
Joined: Dec 26, 2006
Posts: 144
Location: United Kingdom
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| Posted: Sun Feb 24, 2008 9:40 pm Post subject:
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If anyone in the UK needs some lampholders, I got 10 from RS, and have 6, (3 sets) going spare - I'm keeping a pair, 'just in case'. PM me if it's of interest.
BTW - Jurgen. I believe I have a good original copy of 'In a Glass House' here - my brother and I were discussing your stamps the other day, (I did live sound work back in the 70's including at least 1 GG gig - have you ever tried mic'ing up a small pipe organ? and that was before they produced recorders - you know the wooden things you blow down). If I can find it, (it had the transparent 'glasshouse' front), then I'll trade it for credit on future PCB's
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whomper
Joined: Dec 15, 2007
Posts: 201
Location: Israel
Audio files: 2
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| Posted: Sun Feb 24, 2008 9:50 pm Post subject:
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| jhaible wrote: | | 23isgood wrote: | The BOM calls for 741 op amps, could tl071's be used, or any other single op amp?
pete |
IMO, the only reason to try other opamps than the 741 is to find out how it sounds without slew limiting. (Which means nothing else than the circuit distorts earlier for high frequencies than for low and midrange frequencies.) That kind of behaviour is part of the original Schulte Compact A - that's why I specified 741 opamps.
Some may want to try it without this behaviour - that's why I privided pads for bypass caps.
JH. |
Oh, so the reason for putting the 100nF SMD is only to change the above mentioned behavior.
In that case, if I want to be as near authentic as possible, I would not need to solder them, right?
Whomper |
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morbank
Joined: Jan 30, 2008
Posts: 58
Location: USA
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| Posted: Mon Feb 25, 2008 3:01 pm Post subject:
BOM Questions? |
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Is the 100nF "u1" capacitor labeled "1u" on the PCB?
I can't find where the 22uF and 100uF electrolytic caps go on the PCB. There isn't a quantity specified either. Are these caps meant as alternatives to the 10uF tantal and 47uF electrolytic caps?
Thanks, Clay |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Tue Feb 26, 2008 10:25 am Post subject:
Re: BOM Questions? |
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| morbank wrote: | | Is the 100nF "u1" capacitor labeled "1u" on the PCB? |
1u = 1uF - should really be what it says.
| Quote: | I can't find where the 22uF and 100uF electrolytic caps go on the PCB. There isn't a quantity specified either.
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Seems the entries weren't deleted when I was re-using the table, and copying and pasting.
No quantity = 0.
So, these go into your drawer if you have already bought them. Sorry.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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morbank
Joined: Jan 30, 2008
Posts: 58
Location: USA
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| Posted: Tue Feb 26, 2008 11:26 am Post subject:
BOM Questions? |
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[url]1u = 1uF - should really be what it says. [/url]
I was just thrown off by the ("u1") on the BOM after the 100nF Cap. So there is no "u1" on the PCB then?
[url]Seems the entries weren't deleted when I was re-using the table, and copying and pasting.
No quantity = 0.
So, these go into your drawer if you have already bought them. Sorry. [/url]
No biggie, just double checking.
-Clay |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Tue Feb 26, 2008 11:34 am Post subject:
Re: BOM Questions? |
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| morbank wrote: | | Quote: | | 1u = 1uF - should really be what it says. |
I was just thrown off by the ("u1") on the BOM after the 100nF Cap. So there is no "u1" on the PCB then? |
The 100nF is near the 4007 IC. Yes, even marked as 100n and not as u1.
The only reason I'm sometimes using "u1" is because it saves board space. (You have to keep 12 mil distance to pads, or whatever design rules you're working with.) Here, enough space - more common labeling as "100n".
Might even have printed "100nF". 
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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qwave
Joined: Aug 17, 2004
Posts: 21
Location: south-west of Germany
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| Posted: Tue Feb 26, 2008 11:43 am Post subject:
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Finally I heard the Compact Clone a friendly forum member soldered for me solder-iron-beginner so quick.
The sound is _very_ close to the memories of the original phaser I had here about 4 weeks ago.
I spend nearly 30 minutes doing manual sweeps with some Mellotron vs. Roland M-VS1 only recording
Now I have to wait for the 19" rack to arrive. I will "stuff" the board and the transformer into a 2 unit high rack housing. I will take this phaser also on stage for the next berlin school live gig. And I really prefer a pre cabled rack than a stomp-box with an external power supply.
I will upload a picture of the finished CC when its in his housing.
Thanks to Jürgen for his well known quality R&D and selling the PCBs with LDRs to us.
And thanks to b-funk for nice, tidy and fast soldering.
Your two names will be on the front panel !!!
_________________
keep on turning these knobs
Till "Qwave" Kopper
http://www.till-kopper.de |
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morbank
Joined: Jan 30, 2008
Posts: 58
Location: USA
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| Posted: Tue Feb 26, 2008 12:41 pm Post subject:
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| Quote: | | The only reason I'm sometimes using "u1" is because it saves board space. |
Makes sense to me. Thanks for clarifying.
-Clay |
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b-funk
Joined: Jul 17, 2007
Posts: 193
Location: Berlin
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| Posted: Tue Feb 26, 2008 2:17 pm Post subject:
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thanks for the props, qwave...
now i´m a bit ashamed...  |
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23isgood
Joined: Nov 18, 2006
Posts: 236
Location: San Francisco, CA bay area
Audio files: 13
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Thu Feb 28, 2008 2:30 pm Post subject:
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| whomper wrote: | | jhaible wrote: | | 23isgood wrote: | The BOM calls for 741 op amps, could tl071's be used, or any other single op amp?
pete |
IMO, the only reason to try other opamps than the 741 is to find out how it sounds without slew limiting. (Which means nothing else than the circuit distorts earlier for high frequencies than for low and midrange frequencies.) That kind of behaviour is part of the original Schulte Compact A - that's why I specified 741 opamps.
Some may want to try it without this behaviour - that's why I privided pads for bypass caps.
JH. |
Oh, so the reason for putting the 100nF SMD is only to change the above mentioned behavior.
In that case, if I want to be as near authentic as possible, I would not need to solder them, right?
Whomper |
If you're using 741 opamps, I don't expect the bypass caps to make any difference. I haven't soldered them in on my own boards.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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23isgood
Joined: Nov 18, 2006
Posts: 236
Location: San Francisco, CA bay area
Audio files: 13
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| Posted: Thu Feb 28, 2008 8:23 pm Post subject:
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Oh, I just realized that the lamps may not fit in those 1U rack cases. Is it possible to get measurements of the height of the pcb with lamps installed? Just want to make sure I get the right case.
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Thu Feb 28, 2008 11:45 pm Post subject:
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| 23isgood wrote: | | Oh, I just realized that the lamps may not fit in those 1U rack cases. Is it possible to get measurements of the height of the pcb with lamps installed? Just want to make sure I get the right case. |
You need about 5cm.
If you want it rackmounted, you need 2U at least.
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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23isgood
Joined: Nov 18, 2006
Posts: 236
Location: San Francisco, CA bay area
Audio files: 13
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Usine Karate
Joined: Jun 09, 2007
Posts: 64
Location: Hackney Wick
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| Posted: Mon Mar 03, 2008 4:58 pm Post subject:
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Hi jurgen,
I'm just about to commence getting parts for the phaser and wondered which parts to omit if I want to run it off 15v modular supply, I notice you have been kind enough to supply these details for the Tau and the Solina, will you be doing the same for all your projects?
Usine |
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jhaible
Joined: May 25, 2007
Posts: 2014
Location: Germany
Audio files: 24
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| Posted: Mon Mar 03, 2008 11:44 pm Post subject:
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| Usine Karate wrote: | Hi jurgen,
I'm just about to commence getting parts for the phaser and wondered which parts to omit if I want to run it off 15v modular supply, I notice you have been kind enough to supply these details for the Tau and the Solina, will you be doing the same for all your projects?
Usine |
Hi Usine,
that's pointed out in the schematics:
http://www.jhaible.heim.at/compact_clone/jh_krautrock_phaser_sch.pdf
Omit all the parts within the frame "standalone version only", and solder in that MOTM connector instead.
Best Regards,
JH.
_________________
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him. Therefore I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." (Mk 11,23f) |
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Usine Karate
Joined: Jun 09, 2007
Posts: 64
Location: Hackney Wick
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| Posted: Tue Mar 04, 2008 1:12 am Post subject:
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Thanks Jurgen,
Sorry, I hadn't even looked at schematics yet
Usine |
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austrohungaro
Joined: Dec 23, 2006
Posts: 42
Location: Barcelona (Spain)
Audio files: 1
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| Posted: Tue Mar 04, 2008 4:05 am Post subject:
5w resistors |
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I cant find 5W resistors Vertical Mount
I only found axial but leads are too short (or body too tall) to fin in the PCB
Where did you find them?
Is is important to be exactly 5W??
Any link, supplier, advice?
Thanks |
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