jose

OK, but a balanced input is a good alternative... Imagine that in the future, you have a balanced source. You only need to spend a little time and very little money. Edit; My KGST has 3 unbalanced input and 1 balanced input

Thanks!!!

Thanks for your help guys. Yes it's 5 volt. I don't know why use this and I don't remember reading anything about. I ordered this on digikey. In any case, it's my fault and is quite easy to solve. So the correct is the 10 volt versión?

I have a problem with the PSU. Started without load and grounds connected to safety earth. Trafo: 360volt AC x2 and PSU ready for 400 volt DC LV: OK; +15,1 volt and -15,4 volt. Bias: OK; 579 volt at the test point. HV: both sides +119 volt and -119 volt. I don´t see something wrong or blown. Any idea? What can be wrong?

Thanks Nicholas.

Thanks. Yes, all caps are 680uF/550VDC.

Thanks mwl168. I was wrong because I saw the pcb layout and ordered a 360 Volt trafo for 400VDC Well If I use 450 VDC PSU (All I need is change four resistors on de the PSU and it's easy), Need I change something on amp boards?

My progress I ordered a toroid with 360X2 @350mA but I don´t know what I can do. With this trafo, a 400 vol output is a overkill? I would like use a 20mA configuration on amp.

Thanks for the replies. I used nylon screw and aluminum oxide Insulator on my KGST whithout problem. Yes, you haven´t a large press but it´s safe. Well, now I have the Aavid poly sulfide shouder washer too: http://www.mouser.es/ProductDetail/Aavid-Thermalloy/7721-10PPSG/?qs=%2fha2pyFaduh6C0mWin5INmhh82HyIUQkqhWvlgOyq9gqLaH17qc%2f0A%3d%3d But I´m not sure.

Is safe use a metal screw for attach 10m90s to to the heatsink? I bought the poly sulfide shouder washer but I´m not sure if this is enough

Thanks mwl.

Resistors, please check. 100 O, 0.5 W gate stoppers for DN2540, and sense resistors 18 660-MF1/2CCT52R1000F 75 O, 0.5 W (source resistor for output cathode sink) 2 660-MF1/2CC75R0F 180 O, 0.5 W (source resistor for output current load) 4 660-MF1/2CC1820F *182 R 500 O. 0.5 W 4 660-MF1/2CC4990F *499R 1.0 kO, 0.5 W gate stopper for 10M90S 6 660-MF1/2CC1001F 1.2 kO, 0.5 W (source resistor for input current sink) 2 660-MF1/2CC1211F *1,21K 2.0 kO, 0.5 W 4 660-MF1/2DCT52R2001F 5.1 kO, 1 W/500 V 4 294-5.1K-RC 124 kO, 0.5 W, 350 V rated 8 660-MF1/2CC1211F 220 kO, 2 W, 500 V rated 8 660-PCF2C224K 300 kO, 0.5 W, 350 V rated 4 660-MF1/2CC3013F *301K 500 kO, 0.5 W, 350 V rated 4 660-MF1/2CC4993F *499K And trimpot... Im´not sure about last reference (5K) please, any alternative? 20 O multiturn trimmer for output current sink—set current to 17 mA 2 652-3299W-1-200LF 100 O multiturn trimmer for output current load—set current to 7 mA 4 2-3299W-1-101LF 500 O multiturn trimmer for input stage current sink—set current to 1.33 mA 2 652-3299W-1-501LF 5 kO, 0.75 W multi-turn trimmer for input stage balance 2 652-3252W-1-502LF

wooo, thanks mwl. Now I have my SRX on "stand by". I'm working on other amps and I haven´t time for three amp at the same time.

Thanks Sorenb!! I just ordered this.

For LV is correct a sec. With 18-0-18 vct @ 600mA ?

Sorry Dr. Gilmore . I guess I´m one of the first to make the psu ? Fortunately It's easy to fix.

Jim thanks for the recommendation. I will take precautions when starting the psu. However, I do not understand one thing. On the scheme of your PSU I can see the SPX431 but on the layouts PCB Dr. Gilmore uses the TIL731. You say that it didn´t work in this circuit ... I´m not sure. Please, Is it correct?

Is the "TIL731" similar to "SPX431"? I can´t find any reference with TIL731 Possible PSU bom: Part Qty. Mouser Ref. Comments Caps 0,1uF/1Kv 4 505-MKS4.1/1000/10 0,1uF/1000v 3 539-160104J1000N-F 22uF/450v 2 871-B32774D4226K 2,2uF/50v 1 647-UBT1H2R2MPD 100uF/16v 1 Posible cambio a 100/25v 647-UKW1E101MED 330uF/450v 2 647-LKX2W331MESB45 Silicon IXCP10M90S 2 747-IXCP10M90S STF19NM50N 2 511-STF19NM50N DN2540N5G 1 689-DN2540N5-G TIL731* 1 SPX431 ¿?* 701-SPX431AN-L/TR STTH512FP 4 511-STTH512FP 1N4007 2 512-1N4007 BZX55C15 Zener 15v 1 78-BZX55C15 Z4KE150A Zener 150v 1 625-Z4KE150A-E3 1N5952BRLG Zener 130v 3 863-1N5952BRLG Resistor 10 Trimpot 1 652-3296W-1-100LF 100k 2 660-MF1/2CC1003F 100k 1,5W 1 71-CMF65100K00FKEK 3k* 1 273-3.0K-RC* *Xicon 350v 3,32K KOA 660-MF1/2CC3321F 4,7M 1 660-MF1/2DCT52R4704F 806k* 1 71-RN65D-F-806K* *Vishay 350v 1k 3 660-MF1/2CC1001F 15k 1 660-MF1/2DC1502F 15,4k 1 660-MF1/2CC1542F 10k 1 660-MF1/2CC1002F 100 1 660-MF1/2CCT52R1000F 30* 1 273-30-RC* *Xicon 350v 10 1 660-MF1/2DC10R0F 1M 8 660-MF1/2CC1004F 82k* 1 273-82K-RC* *Xicon 350v 82,5K* KOA 660-MF1/2DC8252F 200 1,5W 1 71-CMF65200R00FKEK 133k 1W 1 279-H4P133KDZA 365k 1W 2 279-H4P365KDCA 590k 1W 1 279-H4P590KDZA Others: 3 pin conector 2 651-1729131 2 pin conector 2 651-1729128

jajaja, I would like see the Garmin dates of this guys

Got mine. Thanks!!!!

Got my boards,Thanks!!!!!

If you need cover the additional cost, please let me know.

Interesting. I think that if you have some physical problem, age, or if you are a single cyclo-tourist ( I don´t know if it term in english is correct), I can understand the motor... but in general, I think that the philosophy of the bicycle is other. I like to suffer while climbing a mountain pass and know that I have surpassed myself. The bike has taught me to beat me and believing in me. romanticism? stupidity? probably both

Ok, thanks.

Other bike with a "little" chainring With a 1% climb, this has to be horrible