Quote: EDIT: If you can't use a source resistor, try looking for a 2N5457. It's similar in specs to the 5484. Tangent, in other words, if i dun use any source resistor, I can use 2N5486 for Q2 and 2N5457 for Q1? Another question is that, in my Meta42, I used 2N5486 for Q2 and...

Here are the specs: Type Pd mx/W Vdg mx/V Vdss mx/V Idss mn/mA Igss mx/nA 2N5486 0.31 25.00 25.00 8.00 1.00 2N5459 0.31 25.00 15.00 4.00 - 2N5457 0.31 25.00 15.00 1.00 can i use these 2 for Q1 and Q2? As in Q2 = 2N5486 Q1 = 2N5459 I couldnt get 2N5484 here...

All right guys. Got the problem fixed. The bass boost is working now. Now doing some fine tuning on the amp. Thanks to all who helped. Cheers!!

Quote: Also, if R4 is indeed 2.2K, the bass boost resistor value of 100K is way too high. The bass boost resistor and the feedback resistor (R4) add when bass boost is engaged, so the two should be within an order of magnitude of each other. Personally, I like to keep them equal or close to...

erix.. did u get my email?

Ok. That was according my schematic. Based on the labeling on the PPA, that should be: R6 = 220 ohm R5 = 2.2K R3 = 3.3K R4 = 1M

feedback resistors: R3 = 220 ohm R4 = 2.2 K R5 = 3.3 K R6 = 1M

Quote: The switch has to short the cap and resistor. Measure the resistance across them while toggling the switch. (With the amp turned off.) Yup, i followed what is exactly on the PPA sch. Switch short the cap and resistor, or in other words, the switch, resistor and caps are all...

Quote: What values did you use? caps = 0.1 uF resistor = 100 K I could hear the difference with and without adding the resistor and caps. But the switch just doesnt change anything in sound. I've double check on the switch, it worked perfectly fine.

Has anyone include a bass boost in their amp? I dont mean the PPA, but just merely try and include a resistor, caps and also a switch? I'm building an amp with a bass boost but apparently i dont hear any difference in sound by switching on and off by the switch. Here's how i set it up...

hi guys, sorry to post this here. Erix, do u still remember the last time when i asked u about your MeatHead amp? Apparently u havent update your site, i'm still waiting for the diagram files for your wonderful MeatHead V1. And i can see that you already have the MeatHead V2. Still waiting...

oppss..sorry, posted twice.

nice work was ist los? Do u have a schematic diagram for tht piece? Could u be kind enough to include the diagram or maybe a link? Thanks,.

I know its unrelated but, would a Meta42 with the 4556AD opamp produce anything close to the RA-1 or the clone?

Quote: I also love how comfortable my RS-1s are after bending outward the headband (took me awhile to figure that one out by myself) I'm sorry but i guess i miss tht thread on how to bend it.... could u repeat the steps again on how it is done? and what do u mean by bending...

Yea, i found the Hammond 1590B here. Another thing is erix, i cant seem to find the stomp switch i the Farnell and RS Component Catalogue. They do have push switches, but its all plastic made. I was wondering where did u get your stomp switch?? I want those steel made stomp switches...

erix!! Thanks for dropping by. Its always a pleasure seeing you post. Anyway erix, thanks for explaining about the bypass. And another thing, i went to your hobby site, seeing all those amps you built just make me wanna build more. I like those Hammond die-cast case that u are using...

Hello Guys, For the Erix 47 V2.0 amp, Erix uses bypass caps. I just want to know what are the function for the bypass caps? Thanks.

hi dokebi, well, its for my head amp actually. I know 12 stepped isnt good to make it smooth. But this is what i can afford at the moment. Here are my values: 91R 220R 560R 620R 1K 3K3 5K1 6K8 3K 3K 1K 1K The sum should be around 25 K.

Hi everyone. I would like to build a 12-stepped attenuator as my volume control. But i'm having some problems getting the right values for the resistors. I'm using the 1% resistors, and i want my attenuator to be 25K. Can anyone out there help me with the right values?? I want the...

nice looking knobs!! Its good to hear from u again, erix.

IMEP, nice work on the amp. By the way, what gain are u using?And what phone are u using it with? I also have a Meta amp, but i'm not sure how to add in the crossfeed. I'm using SR-80. How do i go about to connect the switches with the board? I've gone thru tangent's site but i'm still...

anyone else out there who has any experience at all using the BUFs in their Meta? Please contribute your listening experience, thank you. I know that the EL is no more in production, and tangent has lots of them in stock. But still, i'm not trying to discourage anyone from getting the...

Hello guys, its been a while. Just wanna know which of these 2 buffers do you prefer for the Meta42? I know the buf634 wont fit into the meta42, but who knows someone did mod the buf and put it nicely into the board. The reason why i ask is because the current output of the 2 buffers...

oh, common. Nobody wants to share anything here? Is my question wrong or that stupid??