AL-82 vs AL-1500

Discussion in 'Amateur Radio Amplifiers' started by WL7PM, Feb 13, 2020.

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  1. K0UO

    K0UO Platinum Subscriber Platinum Subscriber QRZ Page

    20200219_135423.jpg

    The Two tube 8877

    20200219_135431.jpg
    Standard AL1500

    The manual says 2 X for Ip current and Power out meters

    Actual AMERITRON meters for Grid milliamps
     
  2. K0UO

    K0UO Platinum Subscriber Platinum Subscriber QRZ Page

  3. AG5CK

    AG5CK Ham Member QRZ Page

    You should expect grid current to be lower with higher plate voltage. The pair of 8877s should be squeaky clean at 1500 watts.
     
    K0UO likes this.
  4. WL7PM

    WL7PM Ham Member QRZ Page

    AL82 and AL1500 share identical B+ transformer.
    Would the high voltage modification increase the efficiency and/or gain of the 3-500Z pair similar to the 8877 ?
    ....... 3-500Z are happy at 4KV, correct ?
     
  5. AG5CK

    AG5CK Ham Member QRZ Page

    Yes. I would go for it if you've addressed the filter caps. The bleeders will dissipate more power. My AL-1200 hasn't smoked them on 4000 volts yet but an upgrade may not be a bad idea.

    More gain and lower grid current are worth it IMO. A good 3-500 will handle 4kv with no worries.
     
  6. AI3V

    AI3V Ham Member QRZ Page

    "Special diplomatic unit?"

    Now that's funny.

    Rege
     
  7. AD0AC

    AD0AC Ham Member QRZ Page

    Am I wrong, or has the price of all Ameritron amps substantially increased recently? The AL-1500 now lists for $4,999. Seems like they've all increased from $500 to $1000.
     
  8. W4NNF

    W4NNF XML Subscriber QRZ Page

    I don't know about "suddenly," but they have gone up substantially over the last few years. Look them up on the eham reviews and the prices given there are now way, WAY off. ;)
     

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