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Post subject: BDRI Problem
Posted: Thu May 31, 2012 7:59 am
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Roadie
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Location: Baytown, TX
When I turn my amp on, it's like I have it on some kind of soft mute. It is very quiet, but still audible. Most of the time I have to turn the amp off, then turn it back on. If I leave the standby switch on while doing this, there is a loud pop and then some static, and then the full sound will just blare out. Most of the time, it is fine after that. But, a couple of times it has cut out while I was playing, which I have to do the process of turning it off and on again.

Just in case you don't remember, here is my tube setup

v1-NOS 12ay7
v2-jj ecc803s
v3-NOS 12at7
v4,v5 stock GT's biased at 70mv at the test point.

Thanks in advance!

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Post subject: Re: BDRI Problem
Posted: Thu May 31, 2012 8:19 am
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Think that you may have a failing standby and/or on/off switch. Try Deoxit, first. If that fails, prolly need to lift legs and test continuity/resistance. With today's switches, it's not uncommon for SB switches to go bad, early. As none are rated for the voltages they see.

Good luck!


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Post subject: Re: BDRI Problem
Posted: Thu May 31, 2012 10:14 am
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I was thinking it might be a tube. I'll try the Deoxit. Thanks.

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JH-1B Jimi Hendrix Crybaby
Analogman KOT
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Post subject: Re: BDRI Problem
Posted: Thu May 31, 2012 4:01 pm
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Roadie
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check the speaker jack. that sounds like the exact thing that was happening to mine just after i bought it. i had it fixed and it hasn't given me another problem. i've had it 3+ yrs.


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Post subject: Re: BDRI Problem
Posted: Sat Jun 02, 2012 6:12 am
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BMW2002Ti wrote:
Think that you may have a failing standby and/or on/off switch. Try Deoxit, first. If that fails, prolly need to lift legs and test continuity/resistance. With today's switches, it's not uncommon for SB switches to go bad, early. As none are rated for the voltages they see.

Good luck!


Should I get the Deoxit in a spray or a liquid bottle?

blackstrat71 wrote:
check the speaker jack. that sounds like the exact thing that was happening to mine just after i bought it. i had it fixed and it hasn't given me another problem. i've had it 3+ yrs.


What did you get fixed? Did you replace the jack or just fix a solder joint? Or did you take it an amp tech? I'll probably be trying to fix this myself, since I bought it used and I have no warranty.

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90's ESP Eclipse
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Analogman KOT
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Post subject: Re: BDRI Problem
Posted: Sat Jun 02, 2012 6:52 am
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Roadie
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the jack was bad, i had an amp service tech from my local guitar shop fix it. he replaced the jack and of course the wires wre resoldered so i never asked i was just happy it worked again. it very well could've been a bad solder joint but it was new and i was not going to try to fix it and void any warranty or a chance to dump it for a new one just in case. sence then nothing but good times with it.


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Post subject: Re: BDRI Problem
Posted: Sat Jun 02, 2012 9:46 am
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I hope my problem is that easy. If it's just a bad solder on the cable, then I can fix that. But if I have to take the amp apart to fix something, I would rather just let somebody else do it. I will try to take the back off sometime this weekend and look around. At work now, and maybe tomorrow also.

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90's ESP Eclipse
JH-1B Jimi Hendrix Crybaby
Analogman KOT
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Blues Deluxe Reissue
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Post subject: Re: BDRI Problem
Posted: Sun Jun 03, 2012 9:30 am
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Location: Natural Bridge, Virginia
BLUESMAN1904 wrote:
I hope my problem is that easy. If it's just a bad solder on the cable, then I can fix that. But if I have to take the amp apart to fix something, I would rather just let somebody else do it. I will try to take the back off sometime this weekend and look around. At work now, and maybe tomorrow also.


I tend to agree with BMW that it is probably a switch problem.

It should be pretty easy to check the speaker jack. Just use a wooden chopstick to tap the wire from the output transformer where it is soldered to the jack. Keep the volume low. If you hear static, just resolder the connection.

I remember our discussions about tube choice. How does the BDRI sound with the low gain 12AY7 and 12AT7 in place? Any problems with the 803? From what I have read, the long plate 12AX7s are not usually recommended for combos where the tube is close to the speaker like it is in the BDRI.

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Post subject: Re: BDRI Problem
Posted: Sun Jun 03, 2012 11:00 am
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I had the amp opened up last night. I checked the speaker jack, although not with the amp on. I'll do that tonight (hopefully).

My tube choice sounds great. It did take the drive out of the amp. I will be experimenting with other tubes soon also. I took it out to an open jam, along with my new Gibby, a couple of weeks ago. Had it turned up to about 4 and sounded sweet. I even got a compliment from the host band's leader/guitarist/lead vocalist about how good my tone was. I just was just blown away after I realized that he was blind! He never missed a note!

I actually bought the 803 by accident. I thought I was buying an 83. I bought it also from KCA when I got my NOS tubes. I left the order alone. Then I went on the JJ site and read what I bought. Since it was cheap, I decided to install it anyway. I still have 2 good GT's if that one goes bad. Other than that, I'm pleased with the sound.

I haven't searched yet, but do ya'll have any ideas where I can get those switches. I might as well get the best I can, regardless of price. But let's not get carried away, I'm not gonna spend $50 a switch. :shock: :lol:

I might as well change both switches while I'm in there. Right? 8)

Edit: I looked on the Service Manual and figured out the on/off is a DPST and the standby is SPST. I also got the part #s. So where can I get them? I want to get some with the same connections so that I don't get confused what goes where. :?

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2007 Epi Les Paul Custom
90's ESP Eclipse
JH-1B Jimi Hendrix Crybaby
Analogman KOT
Korg Pitchblack
Boss NS-2 PH-2
Blues Deluxe Reissue
1999 & 2007 Marshall TSL 100 w/1960BV cab


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Post subject: Re: BDRI Problem
Posted: Sun Jun 03, 2012 12:10 pm
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This guy has the switches. They are down near the bottom.

http://www.darrenriley.com/FenderAmpParts.htm

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Post subject: Re: BDRI Problem
Posted: Sun Jun 03, 2012 2:08 pm
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HOLY $#@!, Now that's a coincidence! I just bought both switches from that website. I went to check my email, and seen the notice for your message and whala! Thanks for the effort though. Just took me a little longer to find it, cause I'm at work.

Now I hope this fixes the problem!

_________________
2000 American Deluxe Stratocaster
2011 Gibson Les Paul Trad Pro 50's
2007 Epi Les Paul Custom
90's ESP Eclipse
JH-1B Jimi Hendrix Crybaby
Analogman KOT
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Boss NS-2 PH-2
Blues Deluxe Reissue
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Post subject: Re: BDRI Problem
Posted: Sun Jun 03, 2012 2:18 pm
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BLUESMAN1904 wrote:
HOLY $#@!, Now that's a coincidence! I just bought both switches from that website. I went to check my email, and seen the notice for your message and whala! Thanks for the effort though. Just took me a little longer to find it, cause I'm at work.

Now I hope this fixes the problem!


Good luck.

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Post subject: Re: BDRI Problem
Posted: Thu Jun 07, 2012 5:29 am
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Switches came in yesterday. Installed one at time, to determine which one it could be, starting with the standby switch. After installing both, I still had the same problem.

Every since this problem arose, I always had a thought that it might have been a tube. But I did not know, I'm just a student in amp repair. So last night I replaced each tube 1 by 1, using a stock GT 12AX7. First I started with the ECC803, in V2, since it is not recommended for combo amps due to its long plates. No remedy. Then I pulled the NOS 12AY7 in V1. No remedy there either. Last was the 12AT7 in V3. Bingo! Found the problem! I then put the 12AT7 back in to make sure. It was the problem.

I did not think it could be a NOS tube problem, because these are old tubes, and they were built better. But apparently, it just went bad. I'm sure why.

At home, the volume doesn't get past 2. I've only taken this amp out twice, both open jams, volume set around 4. I thought the problem was a switch, because I'm always switching guitars, and using the standby switch, most of time, to close the circuit. I sometimes activate my tuner when switching guitars also. Well at least I got the problem fixed, and it wasn't a costly repair. Now I have extra switches, for when that problem arises in the future.

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2000 American Deluxe Stratocaster
2011 Gibson Les Paul Trad Pro 50's
2007 Epi Les Paul Custom
90's ESP Eclipse
JH-1B Jimi Hendrix Crybaby
Analogman KOT
Korg Pitchblack
Boss NS-2 PH-2
Blues Deluxe Reissue
1999 & 2007 Marshall TSL 100 w/1960BV cab


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Profile
Post subject: Re: BDRI Problem
Posted: Thu Jun 07, 2012 6:10 am
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Location: Natural Bridge, Virginia
BLUESMAN1904 wrote:
Switches came in yesterday. Installed one at time, to determine which one it could be, starting with the standby switch. After installing both, I still had the same problem.

Every since this problem arose, I always had a thought that it might have been a tube. But I did not know, I'm just a student in amp repair. So last night I replaced each tube 1 by 1, using a stock GT 12AX7. First I started with the ECC803, in V2, since it is not recommended for combo amps due to its long plates. No remedy. Then I pulled the NOS 12AY7 in V1. No remedy there either. Last was the 12AT7 in V3. Bingo! Found the problem! I then put the 12AT7 back in to make sure. It was the problem.

I did not think it could be a NOS tube problem, because these are old tubes, and they were built better. But apparently, it just went bad. I'm sure why.

At home, the volume doesn't get past 2. I've only taken this amp out twice, both open jams, volume set around 4. I thought the problem was a switch, because I'm always switching guitars, and using the standby switch, most of time, to close the circuit. I sometimes activate my tuner when switching guitars also. Well at least I got the problem fixed, and it wasn't a costly repair. Now I have extra switches, for when that problem arises in the future.


That's weird but glad you found the problem. I've had a few NOS tubes go microphonic on me but never act like yours did.

You have a 12AY7 in V1 and a 12AT7 in V3 and you still don't get past 2 at home and 4 live? I regularly play mine set at 6 at home (I don't gig)! I guess time really has taken its toll on my ears. All that sex, drugs, and rock & roll back in the late 60's/early 70's. I wish. :lol: :lol: :lol:

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Last edited by bluesky636 on Thu Jun 07, 2012 2:13 pm, edited 1 time in total.

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Post subject: Re: BDRI Problem
Posted: Thu Jun 07, 2012 10:16 am
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Bill, I live in an old house (est. 1938). It has original 3/4" hardwood flooring and panel walls that were painted by the previous owner. The sound is very overbearing with no sound proofing materials, so the volume gets loud quick.

One place I played at was small, and didn't require the volume past 4. The other place used mics on everybody's amp. High volume wasn't needed there either.

I did want to point out, the amp does sound better with this setup of preamp tubes. I didn't realize the useful gain that I lost by using the previous setup. (Should of listened to ya). I am thinking about ordering some tubes from Eurotubes, just to have some backups.

_________________
2000 American Deluxe Stratocaster
2011 Gibson Les Paul Trad Pro 50's
2007 Epi Les Paul Custom
90's ESP Eclipse
JH-1B Jimi Hendrix Crybaby
Analogman KOT
Korg Pitchblack
Boss NS-2 PH-2
Blues Deluxe Reissue
1999 & 2007 Marshall TSL 100 w/1960BV cab


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