[Top] [All Lists]

Re: [Amps] Emtron DX2 blows ac fuse on going TX

To: <>, <>
Subject: Re: [Amps] Emtron DX2 blows ac fuse on going TX
From: "k7rdx" <>
Date: Sun, 5 Aug 2007 14:13:02 -0700
List-post: <>
Fire it up with a higher amp fuse...The fault may soon become
apparent...Stand by with a fire extinguisher&reflect on all the money spent
on your high dollar amplifiers..BTW:.I love my home brews! Jim K7RDX....
----- Original Message ----- 
From: <>
To: <>
Sent: Sunday, August 05, 2007 12:49 PM
Subject: [Amps] Emtron DX2 blows ac fuse on going TX

> Hello dear OM's
> today I made a visit to an om who showed me his new Emtron DX2 Amplifier
equipped with two GU-74B tubes. It looked very nice and the blower is very
quiet but the problem of this amp surprised me a little:
> -For the inrush current he uses "industrial strengt" fuses in the power
line distribution inside the house. So he can switch on the amp without
blowing the fuse anymore.
> -during tx he can nearly send everytime in the LO switch position, but
changing to HI switch position the fuse in the ac distribution blows nearly
every time in the moment he is starting to send. (This happens sometimes
even in LO position.)
> -His conclusion of the problem and the 'solutions' he got from other om's
nearby and the company selling the PA is: This happens due to the weak
german fuses.
> So far the story. Personally I don't believe that the fuses are the
problem (my Henry 3K classic had only problems with inrush current. On QRO
there is no problem with the fuses at pushing PTT). I think there is an
error in the (new!) amplifier - most likely in the protection circuit in
front of the transformer. Anyway the fuses may be a problem or the entire ac
line, so I advised him to test it in the local club station.
> But being not the expert I wanted to ask this much valued community for
comments here.
> Looking forward to your answers and vy 73!
> Markus, DL4SEQ.
> _______________________________________________
> Amps mailing list

Amps mailing list

<Prev in Thread] Current Thread [Next in Thread>