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Post subject: Ugh. Already an issue with my '71 DR
Posted: Mon Mar 08, 2010 9:38 pm
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Well that didn't take long. This actually happened Saturday, but I haven't really had a chance to post it here.

Basically I was playing for about two hours straight on Saturday. Had the volume on 7 with a little push in front from a Barber Direct Drive (Vol and Drive both at 3), nothing crazy. Sounded fantastic. Put the amp on standby for about 45 minutes and came back and could smell burning plastic or something like similar. I flipped on the amp for a second to see if there was any sound, which there was. Really no loss of volume, just a really gargled tone. Smell is still there today. Seems to be coming out near the reverb and vibrato jacks, but I'm not saying it definitely is. None of the tubes look fried by any means and they don't smell.

Anybody got any ideas what I'm looking at? I will be taking it back to the tech sometime this week.

I did open it up and didn't really notice anything looking really black or very out of the ordinary.

Please not a blown tranny..........


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Posted: Mon Mar 08, 2010 11:00 pm
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Hey Ledzep, it's probably only an open plate resistor, faulty cap, or bad connection. The transformers are probably the most substantial components in the amp. And since the fuse didn't blow I wouldn't panic. Art

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Posted: Tue Mar 09, 2010 10:03 am
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aclempoppi wrote:
Hey Ledzep, it's probably only an open plate resistor, faulty cap, or bad connection. The transformers are probably the most substantial components in the amp. And since the fuse didn't blow I wouldn't panic. Art


+1 I have seen the fuse blow even with a faulty component and it wasn't the power xfmr.

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Posted: Tue Mar 09, 2010 11:22 am
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These things happen - when I had my Bandmaster worked on, I had to take about 3 trips back to the shop - some issues didn't come up until after several hours of playing, and some issues were components that were fine with older components, but with new components couldn't take the strain.

I'd suggest taking it back to the shop, explaining the issue, and they should offer to look at and fix it for free - my guy did.

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Posted: Tue Mar 09, 2010 12:44 pm
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Like nedorama said,get something working,something else goes....weakest link in the chain type thing,hopefully that's nothing major.


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Posted: Tue Mar 09, 2010 9:58 pm
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Thanks guys. Felling better about it. Still haven't had a chance to get it into the tech. I'm keeping my fingers crossed that it is indeed something minor. I'm also hoping it's not a tube issue as all the tubes are original blackplate RCA's.


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Posted: Wed Mar 10, 2010 8:10 pm
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then I would unplug it, stop playing it and get it over when you can. Not worth risking the tubes.

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Our band: http://www.facebook.com/thetoysband


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Posted: Wed Mar 10, 2010 9:30 pm
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nedorama wrote:
then I would unplug it, stop playing it and get it over when you can. Not worth risking the tubes.


Yea, it's been unplugged since it happened. Just sitting in the basement waiting to go to the tech. Hopefully I can get it in tomorrow or Friday.


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Posted: Thu Mar 18, 2010 10:55 pm
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Alright just a leaky filter cap. Back up and running and sounding great!

Next step is a speaker upgrade. I'd like to go Weber, but not sure which would be best. Have an Eminence Legend in there right now. I really am just looking for the classic blackface tone that will really give me a nice full crunch, slightly tighter low end, but will still retain those classic spanky highs.

Anybody have any suggestions? I was also considering the possibility of running the amp through a 2x12 or maybe 2x10, but would still like to have a nice speaker in there so I can have a great tone with the simplicity of a 1x12 combo.

Thanks!


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Posted: Fri Mar 19, 2010 6:45 am
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Good to hear!

Email the folks at Weber and tell them all of that and see what they recommend - tough to go wrong.

If you get an extension cabinet, i'd get a closed one and look to get a different speaker that complements what you have in your amp. Again, might as well ask them while you're ordering your main speaker.

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Posted: Fri Mar 19, 2010 4:43 pm
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LedZep, that is good news!!! I am also a fan of Weber speakers for Fender amps. Three out of four speakers in my Fenders are Webers. Art

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Posted: Sun Apr 04, 2010 12:40 am
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For classic creamy blackface tones, the Weber or Tone Tubby (both, alnico magnet versions) are sure to please.

If you plan to add an extension cab you might also consider swapping your stock output tranny for one with multiple secondary taps (4Ω and 8Ω). These are available on Ebay for around $30 (give or take). If your amp has a grounded 3-conductor power cable installed the amp no longer requires the "polarity" switch on the back panel. You can then "recycle" that switch and use it to change your amp's output impedance to match whichever load you happen to need. Set the switch for 8Ω when running only the internal speaker -- flip it to 4Ω when adding a second 8-ohm load (or when disconnecting the internal speaker to use a 4Ω cab such as a 2 x 12). I performed this mod on my '94 DRRI and it really makes the amp a lot more versatile (it also prevents premature failure of tubes and other chassis components).

HTH

Arjay


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