Problems With ALPHA 8410

Discussion in 'Amateur Radio Amplifiers' started by W3XAF, Mar 29, 2012.

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  1. W3XAF

    W3XAF Platinum Subscriber Platinum Subscriber QRZ Page

    I bought an ALPHA 8410 on 2/1/2012. The serial number is: 841012050301. The amplifier worked fine for about three weeks. After three weeks, the 250V/2 Amp fuse blew every time I turned the amplifier off. I finally ran out of spare 250V/2 Amp fuses and bought about 15 fuses from Radio Shack. The Radio Shack fuses did not blow every time I turned the amplifier off. Yesterday, I was tuning up on 20-Meters. When I reached 1200 watts, I heard a "sizzling" noise, smelled burnt electronic parts and noticed that the RF Output LEDs had extinguished. The Grid MIN and MAX LEDs work fine but I no longer have any illuminated LEDs when I tune up my ALPHA 8410. The LEDs themselves are not burned out because I can see them illuminate on tune-up. Also, the HV KV, GAIN and IPA LEDs still work fine.

    On March 27, my ALPHA 8410 died on me while I was tuning up on 20 Meters. I heard a crackling noise and then smelled electronic parts burning, ie., resistors, inductor coils or transformer wire, and then I couldn't use the ALPHA any more to tune up. It’s completely dead!! No output whatsoever .
  2. W1QJ

    W1QJ Ham Member QRZ Page

    Thanks for sharing your story with us. Your amp is litle more than a month old. It should still be under warranty!! I think it is time to call Alpha and tell them this story. For what you paid for that amp I would be barking up their tree instead of this one. Honestly, call them without delay!
  3. KB4QAA

    KB4QAA XML Subscriber QRZ Page

    Thats tough.

    In the future, it is a good practice to never replace a fuse or reset a circuit breaker more than once without stopping operating and troubleshooting the problem.

    In this case you turned a simple symptom of a blowing (but really a Warning of a problem) into a catastrophe.
  4. WB2WIK

    WB2WIK Premium Subscriber QRZ Page

    Should be under warranty. But I'd put the original 2A blown fuse back.:p

    Never replace a fuse with one of higher value.
  5. WG7X

    WG7X Premium Subscriber QRZ Page

    Seriously... For what one of those things cost, it should never break down in normal Amateur service, especially when less than six months old.

    Although you will surely get sympathy here, your only real option is to investigate a warranty repair.

    I'm sure that the assembled group will be interested to hear how Alpha handles this.

    Good Luck OM.

  6. W1QJ

    W1QJ Ham Member QRZ Page

    He didn't say he bought it new from Alpha did he? Maybe it was used? I assumed it was new by the way he spoke. If it is used and out of warranty then a repair from Alpha is going to be mucho dinero. Why would a fuse blow when you turn an amp off?
  7. AC0H

    AC0H Ham Member QRZ Page

    Doesn't sound right does it. How easy is it to FUBAR the transformer install in an Alpha, or any other amp for that matter?
    He did say it ran OK for three weeks.
    I'd like to know why the OP didn't call Alpha when the second fuse blew instead of trying RS fuses of questionable nature and cross posting this in the product review section.
    Has Alpha EVER been called?
  8. WG7X

    WG7X Premium Subscriber QRZ Page

    No He didn't say he bought it new. I guess that I assumed, that since the 8410 is a recent addition to the Alpha stable...

    Well you know what is said about assumptions; but I would still say that it must be relatively new, and it would appear, just on the surface that the best option is a repair from the vendor, in this case Alpha.

    It will be a real PITA to ship, and only the owner can say if it is worth it or not.

    73 Gary
  9. WB5JHY

    WB5JHY Premium Subscriber QRZ Page

    Yes the amp is new. The serial number posted indicates manufactured in the fifth week of 2012. At this point it needs to go back to the vendor for sure. Nothing more sickening that the smell of burnt electronics.:p
  10. W1QJ

    W1QJ Ham Member QRZ Page

    that settles it, he bought it new. Get it back to Alpha ASAP!!!
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