You should look for an IC that allows you to eliminate the input capacitor. It's not a good thing to have a cap there, particularly an electrolytic.
If you were to use one, it should be a high quality film type.
Look at the RIAA preamp Texas suggests for their LM4562.
http://www.ti.com/lit/ds/symlink/lm4562.pdf
Other chips can be used the same way.
Query about PCB layout of AX-14
Hello DIYers
This sprint layout file is from dear sir vargasmongo3435 here is a link
100W Ultimate Fidelity Amplifier
Can anybody build AX-14 Amp with following PCB layout?
Is everything is ok on this layout, I think 2SC4793 Emitter Track is to close to 2sc5200 Emitter terminal.I am going to make two chanal(Stereo) on 35-0-35VAC/400VA transformer, for getting 100Watt on 8Ohm load.if PCB IS Fine please help if somebody build AX-14 with this layout.
Thanks
Best regards
Hello DIYers
This sprint layout file is from dear sir vargasmongo3435 here is a link
100W Ultimate Fidelity Amplifier
Can anybody build AX-14 Amp with following PCB layout?
Is everything is ok on this layout, I think 2SC4793 Emitter Track is to close to 2sc5200 Emitter terminal.I am going to make two chanal(Stereo) on 35-0-35VAC/400VA transformer, for getting 100Watt on 8Ohm load.if PCB IS Fine please help if somebody build AX-14 with this layout.
Thanks
Best regards
Attachments
Last edited:
Profilkühlkörper 1.06 K/W (L x B x H) 75 x 200 x 40 mm Pada Engineering 8071/75/N
Attachments
Hi Mile Sir,
I would love to build the Apex combination A40 + P30 + TB3 + A Class PSU, almost similar to Mr Terry's build. I have couple of queries, could you please help me out on that.
1. My main trafo is 40-0-40 10Amps (800VA), is this good enough for a A40 stereo setup?
2. Can 'A Class PSU' feed TB3 and P30 together, for stereo setup?
3. Is it possible to control the gain of P30 using a trim pot?
4. What should be be the ideal bias voltage between the 0.33R resistor for A40?
I know my questions are little lengthy .. please forgive as I am a beginner 🙂.
Thank you for being with us.. and for all the designs and support.
Regards
Sha
I would love to build the Apex combination A40 + P30 + TB3 + A Class PSU, almost similar to Mr Terry's build. I have couple of queries, could you please help me out on that.
1. My main trafo is 40-0-40 10Amps (800VA), is this good enough for a A40 stereo setup?
2. Can 'A Class PSU' feed TB3 and P30 together, for stereo setup?
3. Is it possible to control the gain of P30 using a trim pot?
4. What should be be the ideal bias voltage between the 0.33R resistor for A40?
I know my questions are little lengthy .. please forgive as I am a beginner 🙂.
Thank you for being with us.. and for all the designs and support.
Regards
Sha
Hi..olafk,can i replacement the pot.with 50k because 5k hard to find on my country.thanks
regard
regard
Attachments
Last edited:
Hi Juan,
I have built this layout with both TO3 and MJL4281/4301. Sounds lovely. I also built the NX-14 and Sx-14 with some slight mods using this layout. Good job!
I have built this layout with both TO3 and MJL4281/4301. Sounds lovely. I also built the NX-14 and Sx-14 with some slight mods using this layout. Good job!
Hello sir vargasmongo3435
Thanks for replay
I found your sprint layout file for AX-14 with original 2sc5200/2sa1943 on( page no 143 and post #1421) can that PCB is ok. I want your thought on that PCB layout you make from apex layout.
Thanks
best regards
can i substitute the pot.5k with 50k because in my country this part is so hard to find it.
i am sorry my bad english.
regard mantrieSolder