Search results for query: Patrick
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All Hitachi Lateral FET amplifier for DIY described by Paul Kemble
(y) The advise is a real good one, for all others who don't understand why I use fixed resistors for trimming, especially in SMD. Best regards, Patrick- EUVL
- Post #549
- Forum: Solid State
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The XEN XELF Headphone Buffer
:giggle: Have you read post #2 or #16 ? Maybe also search "discrete" in this thread ? Some like to power them with +/-15V LiFePo's. Patrick- EUVL
- Post #66
- Forum: Headphone Systems
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Mini speaker - Japanese 100 Yen shop "Daiso" - 300 Yen speaker's modified model
If you have a printer : https://www.thingiverse.com/thing:4546736 :giggle: Patrick .- EUVL
- Post #67
- Forum: Full Range
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Semisouth R100 Circlotron?
But we have already published everything. Patrick -
Preamplifier Dispre 2 - JFET
In your application, Vds doesn't vary much. So impact on id (similar to Early Effect) is less significant. Not the case when used as a follower. Also when matching NJFET to PJFET, the matching only applies to one specific Vds. Toshiba devices doesn't have this issue. Patrick- EUVL
- Post #195
- Forum: Analog Line Level
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Very simple quasi complimentary MOSFET amplifier
Patrick, I have not done that mod yet. I read about it, read Hugh's comments on it, and since there was no comments on whether it was absolutely needed or not, I left it out for now. It looks like an easy fix if needed, just have to undo the transistors and pcb to solder on the bottom of pcb. Is...- Kokanee
- Post #2,757
- Forum: Solid State
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A Trio of 4-Transistor Line Buffers
People say, why keep using unobtanium JFETs ? Apart from that they sound good (to me at least), they provide a high input impedance. So you have no problems driving them with any volume attenuator. Patrick- EUVL
- Post #4
- Forum: Analog Line Level
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The F5 Preamp 2024
Some measurements of the balanced preamp shown above : www.diyaudio.com/community/threads/the-f5-preamp-2024.419289/post-7954367 Quite amazing actually. :giggle: Patrick . -
Hybrid ZEN Amplifier + LM317 = Efficient and simple
It is always a good idea to have a gate stopper. As close to the gate pin as possible. Patrick -
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Pearl 3 Burning Amp 2023
Ok Patrick, thanks for the information. I have a question about the switch for the power supply. A SPST switch is denoted under comments. But the part number is for an E-Switch SPDT. Is this an error? Does somebody have the correct part number? Thanks, John -
Group Buy - Very Simple Almost Universal Speaker Protection
Normally leaded resistors are specified by wattage (e.g. 1/8W, 1/4W, 1W, 2W, ....) SMD resistors are specified by case size (0603, 0805, 1206, .....) Exception is MELF (0204, 0207, ....), but they are normally preceeded by "MELF". I thought it was pretty obvious. Patrick- EUVL
- Post #54
- Forum: Group Buys
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Iron Pre Essentials Kits For The DIYA Store - Register Your Interest
which gen of IPre pcbs you have and which gen twister pcb? post pics, Patrick should be able to decipher -
The F5 Preamp 2024
Many many thanks for spending time among your busy schedules to organise these listening sessions. :giggle: Patrick -
Mini speaker - Japanese 100 Yen shop "Daiso" - 300 Yen speaker's modified model
Now finished. Significant improvement in bass. Of course not deep bass. But what bass you get is not bloomy. So definitely will keep. :giggle: Patrick- EUVL
- Post #108
- Forum: Full Range
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The F5 Preamp 2024
No, both first and second stages have gain. Working principle is same as F5 power amp. Just different devices and bias. Patrick -
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Pearl 3 Burning Amp 2023
Krikey! You have had plenty of coffee, Patrick! Good man. :) -
Hybrid ZEN Amplifier + LM317 = Efficient and simple
So the sonic improvement may be due to the increase in bias, rather than anything else. Patrick -
Mini speaker - Japanese 100 Yen shop "Daiso" - 300 Yen speaker's modified model
To expect great drivers and also hardware for the price you paid is, for me, unrealistic. Patrick- EUVL
- Post #63
- Forum: Full Range