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  1. SM2GXN

    Need Help Buiding the project Linear FM 50Watt with BLY90.

    This could be a better choice... http://electroschematics.com/22/88-108-mhz-40w-wideband-power-amplifier-mrf171a/ Oh yes! It is illegal! Hopefully you know what you are doing. If you build this amplifier, don't use it unless you are willing to lose some money or spend some time in jail  ;) I...
  2. SM2GXN

    Stepper motors

    Hi! Can anyone recommend a good book about stepper motors? It wont hurt if it is for free  ;) Yes I know that there is a great deal of info on the web about steppers but it's lot better to have it on my hard drive. Thanks in advance  :)
  3. SM2GXN

    Power supply for car amp

    Hi frankwas! This link will give you an idea about how it looks like in your car amplifier, guess you need at least 1000VA transformer for your amplifier if you want to rock real hard, 1400W that is lots of power, your amplifier might have more than two channels, can you take a snap shot of the...
  4. SM2GXN

    PSpice model for tube.

    Hi nandi and welcome to this forum! Check at Duncans: http://www.duncanamps.com/spice.html There are not many but it's a good start, a search on google will bring you more I guess.
  5. SM2GXN

    Tele Conversion Lense Mount How-TO

    Hi rybitski! Nice job ;)! I'll try that on my Canon powershot A610 I bought couple of month ago.
  6. SM2GXN

    Philips 29PT3323/79

    Hi tendi! Go to http://fileshare.eshop.bg/  and enter L01.01 in the search field  ;)
  7. SM2GXN

    Has anybody heard from Staigen?

    Hi! No I'm afraid that I have to say no letter in return or any sign  :( The very last hing he said was that his computer crashed. We had a conversation on ICQ and at that time he was complaining about his health but a few days later he told me that he was getting better. I found Staigens...
  8. SM2GXN

    Has anybody heard from Staigen?

    Hi again Bob! His name is Stig and I did send the letter to his home adress I got his adress for long time ago because I was supposed to send him some junk :) As I said I've tried to search for his phone number but with no success, couldn't find a name that matched his in same area, maybe I...
  9. SM2GXN

    Has anybody heard from Staigen?

    Hi CooperMan! Haven't heard from him either, I dropped him a letter but no sign of life in return tried to find his phone number but couldn't find anyone that matched his name  :(
  10. SM2GXN

    Difference between 5/7/12mi range radios and leveling the playing field...

    :) Nice photo! SF465 K is a saw filter for the front-end of the receiver, there is two black two legged components, one is located to the right of the "tied to the antenna" hole and the second one just above SF465 K2, I guess these are pin diodes used as transmit/receive switch. My second guess...
  11. SM2GXN

    Difference between 5/7/12mi range radios and leveling the playing field...

    Take another picture (If possible closer) in the area of the shiny thing marked SF465 K2 and the black square component below it, there is 4 air wound coils in that area too. Can you read the marking on the square component with 4 legs?
  12. SM2GXN

    Difference between 5/7/12mi range radios and leveling the playing field...

    These torx heads are quite common but there's some heads that are especially made for screw driver wizards  ;D they are a real pain if you don't got right tools. Well, why not take a snap shot of both sides of the pcb I've always been curious about how they look like inside.
  13. SM2GXN

    Difference between 5/7/12mi range radios and leveling the playing field...

    65ShelbyClone I guess we need a schematic to be able to investigate if it is possible to increase the power, we don't know if they use transistors or a PA module. The only thing I know about these radios is that the frequency they cover can be changed on some models Would be interesting to see a...
  14. SM2GXN

    Difference between 5/7/12mi range radios and leveling the playing field...

    That's the whole truth oldgrandpainmi :) Use of an external antenna with higher gain is probably the easiest way to increase the range. If the antenna connector on these radios is BNC or TNC it's easy to make something that fit, to increase the transmitting power you need to dig into the radio...
  15. SM2GXN

    CRT monitor

    HI felto! Sad to hear that the replacement didn't solve your problem but what do you mean by squelching noise?
  16. SM2GXN

    Capacitor Voltage

    Hi MP! You and oldgrandpainmi answered your question :) I apolgize I've missed it  :-[ As you said higher voltage rating is equal to bigger size, let us take one example about size, a crowded pc motherboard usually got their filter caps real close spaced, replacing one of them with higher...
  17. SM2GXN

    relay question

    You are so right Ante  ;) Just an add to this discussion, check this article on how to reduce power dissipation in relays and solenoids, interesting don't you think? http://www.elecdesign.com/Articles/ArticleID/11162/11162.html
  18. SM2GXN

    audioguru fm transmitter

    I would prefer the lower class C circuit unless the drive is to low, the upper class AB circuit need less drive. Class AB will drain the battery faster and lower the efficiency, power amplifiers for fm transmitters doesn't have to run linear.
  19. SM2GXN

    sansui au-x701 trouble

    Yes it looks like 10 ohms to me also. I've seen many different power supplies but never (I think) anything like MR8 and MR9 creating some kind of virtual ground. Have you measured for low resistance right after mD4 and mD6? I would measure both +32 and -32 to see if there is any difference in...
  20. SM2GXN

    Need Help can't understand the parts

    Hi pyroboy! The component that are marked as capacitors are probably ferrite beads and they are used as filters but there is two disc ceramic capacitors one each side of these beads, if there is a white ring around them it is diodes but I can't see any on the picture, The black thing is an...
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