Author Topic: JojoD's Tube and Solid State Projects (Read 1137535 times)

JojoD818 · « **Reply #120 on:** Aug 20, 2006 at 04:25 PM »

desired amplifier layout....

JojoD818 · « **Reply #121 on:** Aug 20, 2006 at 04:26 PM »

huge!

JojoD818 · « **Reply #122 on:** Aug 20, 2006 at 04:27 PM »

Torroidal Tranny

ATJr. · « **Reply #123 on:** Aug 21, 2006 at 10:39 AM »

Quote from: JojoD818 on Aug 20, 2006 at 04:25 PM

desired amplifier layout....

uy, conrad heatsinks, oks yan....

magkano yung amplino na torroid?

JojoD818 · « **Reply #124 on:** Aug 21, 2006 at 11:43 AM »

Tony,

Amplimo V8014 Torroidal:

98 EUR + Netherlands VAT + 52 EUR shipping + %#@$% Local Tax

http://www.amplimo.nl/index.html?lang=en-uk&target=d15.html

choariwap · « **Reply #125 on:** Aug 21, 2006 at 01:15 PM »

actually customs only cost me 1K for the tranny.. was expecting more, but then, why should i complain?

ATJr. · « **Reply #126 on:** Aug 21, 2006 at 03:01 PM »

Quote from: choariwap on Aug 21, 2006 at 01:15 PM

actually customs only cost me 1K for the tranny.. was expecting more, but then, why should i complain?

i paid P3090 in taxes for my heatsinks from conrad shipped via air21/fedex, luckily for me, julian gave me a $42 rebate, ok na rin...

i never had any problems with items coming from states that went thru the postal system..

choariwap · « **Reply #127 on:** Aug 21, 2006 at 07:38 PM »

heatsinks were around 500 PHP, again less than i expected

i had both shipped via priority air mail, got here in around 2 weeks.

i bought some tubes online before, had them shipped EMS ~200 USD worth, didnt pay anything. it was even delivered to my house in 5 work days.

my experience with fedex/ups is that you get charged a lot for the customs, around 20% of value + shiping.

but then, for expensive stuff you just have to fedex

JojoD818 · « **Reply #128 on:** Aug 23, 2006 at 09:48 AM »

Matching them MOSfets

ATJr. · « **Reply #129 on:** Aug 23, 2006 at 02:05 PM »

jojo,

how many mosfets do you screen/have? are they that far off? Vgs i mean....whatch out for those guys called "buraongs" at raon corners selling these semicons in tubes, sometime you may get lucky and buy those mosfets in plastic tubes. i once paid 5buck each for a platic tube of trannies worth hundreds, these guys do not seem to know what they are selling...

JojoD818 · « **Reply #130 on:** Aug 23, 2006 at 06:48 PM »

Quote from: TonyT on Aug 23, 2006 at 02:05 PM

jojo,

how many mosfets do you screen/have? are they that far off? Vgs i mean....whatch out for those guys called "buraongs" at raon corners selling these semicons in tubes, sometime you may get lucky and buy those mosfets in plastic tubes. i once paid 5buck each for a platic tube of trannies worth hundreds, these guys do not seem to know what they are selling...

tony,

I think I have 25pcs of the N-channel while 15pcs of the P-channel. Some have the same lot numbers but the worst difference is 0.9volts. I have to match them since the F1 doesn't have any form of dc offset adjustment (though NP said I can tailor the ccs resistors). So far I have several matched fets and to be sure I tested them using 100mA, 250mA, 500mA and 1A test currents. Btw, these hexfets are from International Rectifier.

Before, we can really get lucky but I think now they (the buraongs) have been taught of the value of what they are selling.

Curse those big mouthed fools.

ATJr. · « **Reply #131 on:** Aug 23, 2006 at 09:45 PM »

oh i don't think that will happen, i told them the value of the things they sell, and they said they don't care, as long as they can sell it fast. semicons are not the same as tubes, there are no suckers running after them the way that they run ater tubes.

the law on supply and demand pretty much applies here, they have many stocks and not so many wanting to buy..

JojoD818 · « **Reply #132 on:** Aug 23, 2006 at 11:04 PM »

Quote from: TonyT on Aug 23, 2006 at 09:45 PM

oh i don't think that will happen, i told them the value of the things they sell, and they said they don't care, as long as they can sell it fast. semicons are not the same as tubes, there are no suckers running after them the way that they run ater tubes.

the law on supply and demand pretty much applies here, they have many stocks and not so many wanting to buy..

i wish they have a tube of lateral mosfets for an Anthony Holton Mosfet amp.

ATJr. · « **Reply #133 on:** Aug 24, 2006 at 06:47 PM »

there is a guy there named LITO, i had his cellphone number, but lost it when i lost my cellphone on my way to Cabanatuan. :'(

just look for guys with plastic tubes, he even texted me lists of items he had and there were lots of n-channel power mosfets then, sayang, paalis ako that time...

JojoD818 · « **Reply #134 on:** Aug 24, 2006 at 07:57 PM »

Quote from: TonyT on Aug 24, 2006 at 06:47 PM

there is a guy there named LITO, i had his cellphone number, but lost it when i lost my cellphone on my way to Cabanatuan. :'(

just look for guys with plastic tubes, he even texted me lists of items he had and there were lots of n-channel power mosfets then, sayang, paalis ako that time...

Ouch! Sayang naman mga contact numbers mo dun sa cell. Yun cell madaling palitan, yun mga contacts mahirap hagilapin

.

Where do I start looking Tony? I'm having this SS itch inside me which means I need SS projects to do, kaya excited na ako sa F1 amp that I'm doing now... pero gusto ko sana gumawa ng personal amp ko na medium power, Class AB with Mosfet devices.

Thanks

JojoD818 · « **Reply #135 on:** Aug 25, 2006 at 10:40 AM »

PCB Design from acaudio.

JojoD818 · « **Reply #136 on:** Aug 25, 2006 at 10:40 AM »

ATJr. · « **Reply #137 on:** Aug 25, 2006 at 11:09 AM »

Quote

Where do I start looking Tony? I'm having this SS itch inside me which means I need SS projects to do, kaya excited na ako sa F1 amp that I'm doing now... pero gusto ko sana gumawa ng personal amp ko na medium power, Class AB with Mosfet devices.

this looks ok:http://www.diyaudio.com/forums/showthread.php?postid=945573#post945573.

JojoD818 · « **Reply #138 on:** Aug 25, 2006 at 11:19 AM »

I meant looking for the buraongs.

ATJr. · « **Reply #139 on:** Aug 25, 2006 at 11:36 AM »

ah, them?

you can see them at corners along the street where eleshop is located, sometimes besides the corner where Pacific is, when you guys toting plastic tubes with semicons, sila na yon...grabe tawaran, kailangan matibay ang dibdib mo.

sayang nga lang at wala akong time na magbabad sa raon...

while you are there please look for tda1543 oe tda1541 ok? thanks

JojoD818 · « **Reply #140 on:** Aug 25, 2006 at 11:41 AM »

Quote from: TonyT on Aug 25, 2006 at 11:36 AM

ah, them? you can see them at corners along the street where eleshop is located, sometimes besides the corner where Pacific is, when you guys toting plastic tubes with semicons, sila na yon...grabe tawaran, kailangan matibay ang dibdib mo.

sayang nga lang at wala akong time na magbabad sa raon...

while you are there please look for tda1543 oe tda1541 ok? thanks

I sure hope I see them plastic totting guys... baka kasi iba makita ko.

1543/1541, ok will do.

Thanks

Garp · « **Reply #141 on:** Aug 25, 2006 at 02:02 PM »

Quote from: JojoD818 on Aug 25, 2006 at 10:40 AM

Jojo nice work. Busy ka ha.

P.S. Patawad sir alam kong may utang ako sayo. One of these days (am waiting for free time)... di na lang ako promise kakahiya na eh.

BTW yung mga TDA chips, wala na ba sa Newport? That's where I got my 1541 and 1543 dati. Syempre walang S1 or S2 kahit saan ako magtanong.

s2kov · « **Reply #142 on:** Aug 25, 2006 at 02:25 PM »

garp,

baka may alam ka'ng source ng CS8412/CS8414

Garp · « **Reply #143 on:** Aug 25, 2006 at 02:45 PM »

Andy wala eh. Yung pa rin dati na order sa Newark via Access Frontiers, pero CS8414 lang.

s2kov · « **Reply #144 on:** Aug 25, 2006 at 03:08 PM »

magkano kuha mo?

Quote from: Garp on Aug 25, 2006 at 02:45 PM

Andy wala eh. Yung pa rin dati na order sa Newark via Access Frontiers, pero CS8414 lang.

Garp · « **Reply #145 on:** Aug 25, 2006 at 03:39 PM »

Its posted at $12 dollars sa Newark. I just don't know kung anong conversion ng AFT ngayon pero at least no shipping cost. Kaya napamahal ako data kasi umorder pa ako ng brown dog adapter sa cimarron tech kaya almost 2K inabot ko.

s2kov · « **Reply #146 on:** Aug 25, 2006 at 03:43 PM »

thanks garp, will call them early next week!

Quote from: Garp on Aug 25, 2006 at 03:39 PM

Its posted at $12 dollars sa Newark. I just don't know kung anong conversion ng AFT ngayon pero at least no shipping cost. Kaya napamahal ako data kasi umorder pa ako ng brown dog adapter sa cimarron tech kaya almost 2K inabot ko.

choariwap · « **Reply #147 on:** Aug 25, 2006 at 05:57 PM »

jojo,

pogi! swabe as usual

napawelding na ba yung tranny leads? hehe

JojoD818 · « **Reply #148 on:** Aug 26, 2006 at 02:29 AM »

Quote from: choariwap on Aug 25, 2006 at 05:57 PM

jojo,

pogi! swabe as usual

napawelding na ba yung tranny leads? hehe

Thanks

What leads? Those gauge #10 or #12 ones?

My soldering station is having trouble heating those leads.

Guess it's time to bring out the old Weller 140W soldering gun out of it's holster.

JojoD818 · « **Reply #149 on:** Aug 26, 2006 at 02:38 AM »

Quote from: Garp on Aug 25, 2006 at 02:02 PM

Jojo nice work. Busy ka ha.

P.S. Patawad sir alam kong may utang ako sayo. One of these days (am waiting for free time)... di na lang ako promise kakahiya na eh.

BTW yung mga TDA chips, wala na ba sa Newport? That's where I got my 1541 and 1543 dati. Syempre walang S1 or S2 kahit saan ako magtanong.

Thanks man.

No problem, let's hook up when time permits.

I just went there as per Tony's request, the 1543 looks good but the 1541A is a bit questionable, unlike the ones we see on the net, the stampings are a bit odd and the Philips logo is missing, the 1543 however has the logo.

I guess it's just up to Tony and Andy to decide. Btw, wasn't able to get the prices since their computers were already shutdown when I came in.

I heard that only the 1541A and 1541R1 is available in the Philippines, however, rumors are no use to us until we get a fix on who sells them. I'll try again and find any other sources locally.