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Thread: HL2500FX

  1. #1
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    HL2500FX

    Any info where I could get a Shop Manual. My fan runs hi speed but the power and Meter Lights don't go on. Have a small Schematic but no explanation. 73 Kurt

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    I put this Question also in the Amp discussion since I was confused, but it belongs here. I have the error code: AC 3V(U?) UNDER LINEVOLTAG. There no 3V Power Supply. What does it mean ?
    If you can help please let me know. 73 Kurt

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    Found the error problem, ripped of an wire on the 100V PS

  4. #4
    Hello Kurt,

    Have you replaced the meter lamps? My HL-2500FX's PV/kW lamp is out and I'm not sure if I can replace it. Is getting access to the lamp difficult? I know it's a common 12v wheat lamp (which I have on hand) but it looks like it would be a big job to take the amp apart to replace the bulb. Is it difficult to do so?

    Sam
    K8NOS

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    The front panel comes off on the 2500 without problem. There are 2 screws on each side too,.Sorry, I forgot most since I fixed it a while ago. 73

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    Hello Sam.
    you must be also one with the hl2500. I believe only 16 are sold here?
    I had no bad Lamps. But the front unscrews easy ,I believe two screws on each side but I forgot. Good luck. 73 Kurt

  7. #7
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    Quote Originally Posted by WB2YVY View Post
    Hello Sam.
    you must be also one with the hl2500. I believe only 16 are sold here?
    I had no bad Lamps. But the front unscrews easy ,I believe two screws on each side but I forgot. Good luck. 73 Kurt

    I think 40 was sold in total. Of that 20 in the USA.
    I also have one and I personally know another Ham who has one.
    Four that I have heard of have had problems. Always seems to be the same thing. Do Not run this Amp past legal limit or it will either kill a power supply or knock out some of the FET's.

    Rob

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    Cool HL2500FX

    I had two drain to gate shorted in one stage, replaced these with cheep EBay parts. One lost half chips in the IC. bought expensive Digikey VRF's but did not match. The 3 p/p stages are combined- if they don't match power is dumped in 3/ 18 Ohm resistors on a Heat sink with a Thermal Relay. Now after 1 Minute of 1.5 KW it switches off, ssb is fine since it is Pulse Modulation.
    I red a note from DG8DP he thinks in order to go on 50Mhz THP reduced the series input resistor to .25 Ohm, he would not go under 2 because of oscillations. I planning to do that to. Will ask Arrow if they can deliver 6 pair matched. 73 Kurt

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    SORRY MADE A MISTAKE

    Tey are not Microsemi FETs they have a round marking with a J bottom curled, 73

  10. #10
    how to open the 2500fx to transmit on all bands, having problems with 24 mhz

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