Search found 233 matches

The last time I had a JBL D120F re-coned by authorized JBL service center, I was informed the only JBL kits available were the "E" series. Price for 120 and 130 speakers was around $279 eac ...

Save your money and go for the 67 cent cap. $20 for a capacitor? I can't justify that!

Les Paul Gibsons use 0.047 ufd for tone according to Gibson Guitar website.

I have to agree with Will Cowell. A vacuum tube is a linear amplifying device. It reproduces what is applied. I've never heard of tubes having scooped mid-range. A scooped sound is a result of compon ...

I have an Evans AE-100 I bought from John Hughy. After experiencing intermittent distortion, I found coupling cap on reverb board was broken at the board. Was able to solder a new lead on cap and re- ...

I believe the model should be SE120.

Lysol spray will usually kill odors and the bacteria that causes the odor.

Easiest check is replace rectifier, then check B+ voltages. If it still blows fuse, a shorted tube, capacitor or OT COULD be problem. Remove all tubes except 5AR4. If it still blows fuse, I suspect a ...

Instead of buying a high price piece of equipment, I have used the following method to check bias setting for Fender Twin Reverb.
Buy precision one ohm one watt resistors and solder them between the ...

I have a Boss Tremolo TR-2 I bought new, never used. $60 shipped. Emil me if interested.
Larry

I play my Gretsch 6120 through an Evans AE100 with external JBL G125 speaker. I have had no problem getting the sound I had when I used a Twin Reverb w/JBL speakers. If I was in the market for a new ...

One main difference between silicon and germanium transistors is: The emitter base voltage for germanium is approx. 0.2VDC and the emitter base voltage for silicon is 0.7VDC. If you sub a silicon tra ...

The flux density is different for Neo, Alnico, and Ceramic magnets used in speakers. There is no simple answer to your question, in my opinion. There is a lot of information on the link posted by Ric ...

I have an AE100 I bought from John Hughey in 2005. I had a problem with intermittent distortion. I found a broken wire on the component (coupling cap to reverb board). I was able to repair it and it ...

Mouser Electronics has the chips. You can look at their catalog for prices. I would replace those 4558's with the 2134 chips. I replace the 4558 chips in my Bandit 65 with the OPA2134' with no probl ...

I would buy one tube made by the same mfg. as the other
el84's. Check that it isn't glowing cherry red after you plug in the new tube. If it sounded good before you broke the tube, it will probably ...

Visit the following site: http://lansingheritage.org/.
I found photo's of the D-131 in the Lansing catalogs and they all had aluminum dust covers. I suspect someone had it re-coned by someone other ...

I believe input 2 is attenuated 6db which accounts for th different levels.

If the static current is 18ma then something is definitely wrong. Static current should be around 35-38 ma for each tube. Are you sure you measured the values correctly? I personally would not hack ...

I have a copy of an old op instructions for Evans Amp which reads: Expand boosts lows and highs. Depth--Boosts lows and low mids; cuts some of the highs. Note: When using this control, you may need ...

The Digitech Hardwire DL-8 has modulated delay I think is quite good. This pedal is quiet and has other features as well.

David, the value of the cap should be 22 mfd, not 0.22. It's sole purpose is to keep the bias voltage constant.

The resistor is there to provide bias for the tube(called cathode self bias). The cap (cathode bypass cap) keeps the voltage constant across the resistor. if you remove the cap, degeneration is introd ...

I have a custom built open back speaker cab. I presently have EVM-12S installed in it. I'll sell the cab for $140 + shipping cost. Photo on request.
Larry Robinson

I have a JBL E-120 8 ohm speaker mounted in a Marrs cabinet. Cost is $275 + shipping cost. Email me for photos if interested.

Author	Message
Topic: D130 or E130 JBL ?
Larry Robinson Replies: 21 Views: 11356	Forum Section: Electronics Posted: 23 Apr 2014 1:36 pm Subject: D130 or E130 JBL ?
Larry Robinson Replies: 21 Views: 11356	The last time I had a JBL D120F re-coned by authorized JBL service center, I was informed the only JBL kits available were the "E" series. Price for 120 and 130 speakers was around $279 eac ...
Topic: Mallory cap
Larry Robinson Replies: 11 Views: 4258	Forum Section: Electronics Posted: 28 Mar 2014 3:24 pm Subject: Mallory cap
Larry Robinson Replies: 11 Views: 4258	Save your money and go for the 67 cent cap. $20 for a capacitor? I can't justify that!
Topic: Mallory cap
Larry Robinson Replies: 11 Views: 4258	Forum Section: Electronics Posted: 26 Mar 2014 12:16 pm Subject: Mallory cap
Larry Robinson Replies: 11 Views: 4258	Les Paul Gibsons use 0.047 ufd for tone according to Gibson Guitar website.
Topic: "Voiced For Steel"
Larry Robinson Replies: 59 Views: 19375	Forum Section: Electronics Posted: 31 Jan 2014 3:17 pm Subject: "Voiced For Steel"
Larry Robinson Replies: 59 Views: 19375	I have to agree with Will Cowell. A vacuum tube is a linear amplifying device. It reproduces what is applied. I've never heard of tubes having scooped mid-range. A scooped sound is a result of compon ...
Topic: Evans SE200 Thread Revised
Larry Robinson Replies: 26 Views: 8126	Forum Section: Electronics Posted: 29 Aug 2013 2:37 pm Subject: Evans SE200 Thread Revised
Larry Robinson Replies: 26 Views: 8126	I have an Evans AE-100 I bought from John Hughy. After experiencing intermittent distortion, I found coupling cap on reverb board was broken at the board. Was able to solder a new lead on cap and re- ...
Topic: Is anyone familiar with the Evans E120 ?
Larry Robinson Replies: 5 Views: 2413	Forum Section: Electronics Posted: 27 Jan 2013 6:56 am Subject: Is anyone familiar with the Evans E120 ?
Larry Robinson Replies: 5 Views: 2413	I believe the model should be SE120.
Topic: Best thing to remove smoke smell from case interior
Larry Robinson Replies: 23 Views: 7762	Forum Section: Electronics Posted: 2 Jan 2013 2:28 pm Subject: Best thing to remove smoke smell from case interior
Larry Robinson Replies: 23 Views: 7762	Lysol spray will usually kill odors and the bacteria that causes the odor.
Topic: Rectifier Tube question -Fender Tremolux...
Larry Robinson Replies: 14 Views: 3307	Forum Section: Electronics Posted: 23 Dec 2012 9:21 am Subject: Rectifier Tube question -Fender Tremolux...
Larry Robinson Replies: 14 Views: 3307	Easiest check is replace rectifier, then check B+ voltages. If it still blows fuse, a shorted tube, capacitor or OT COULD be problem. Remove all tubes except 5AR4. If it still blows fuse, I suspect a ...
Topic: Tube amp biasing-reference book?
Larry Robinson Replies: 7 Views: 2717	Forum Section: Electronics Posted: 20 Nov 2012 12:04 pm Subject: Tube amp biasing-reference book?
Larry Robinson Replies: 7 Views: 2717	Instead of buying a high price piece of equipment, I have used the following method to check bias setting for Fender Twin Reverb. Buy precision one ohm one watt resistors and solder them between the ...
Topic: Tremolo pedal
Larry Robinson Replies: 5 Views: 1082	Forum Section: Wanted To Buy Posted: 16 Nov 2012 2:23 pm Subject: Tremolo pedal
Larry Robinson Replies: 5 Views: 1082	I have a Boss Tremolo TR-2 I bought new, never used. $60 shipped. Emil me if interested. Larry
Topic: Fender Mustang 3 noise
Larry Robinson Replies: 6 Views: 1845	Forum Section: Electronics Posted: 31 Oct 2012 7:49 am Subject: Fender Mustang 3 noise
Larry Robinson Replies: 6 Views: 1845	I play my Gretsch 6120 through an Evans AE100 with external JBL G125 speaker. I have had no problem getting the sound I had when I used a Twin Reverb w/JBL speakers. If I was in the market for a new ...
Topic: Original components: worth the wait?
Larry Robinson Replies: 21 Views: 5888	Forum Section: Electronics Posted: 19 Sep 2012 2:58 pm Subject: Original components: worth the wait?
Larry Robinson Replies: 21 Views: 5888	One main difference between silicon and germanium transistors is: The emitter base voltage for germanium is approx. 0.2VDC and the emitter base voltage for silicon is 0.7VDC. If you sub a silicon tra ...
Topic: Neo/Alnico
Larry Robinson Replies: 3 Views: 1367	Forum Section: Electronics Posted: 10 Jul 2012 6:28 am Subject: Neo/Alnico
Larry Robinson Replies: 3 Views: 1367	The flux density is different for Neo, Alnico, and Ceramic magnets used in speakers. There is no simple answer to your question, in my opinion. There is a lot of information on the link posted by Ric ...
Topic: Evans question
Larry Robinson Replies: 28 Views: 14920	Forum Section: Electronics Posted: 25 Apr 2012 6:01 am Subject: Evans question
Larry Robinson Replies: 28 Views: 14920	I have an AE100 I bought from John Hughey in 2005. I had a problem with intermittent distortion. I found a broken wire on the component (coupling cap to reverb board). I was able to repair it and it ...
Topic: Help please on placement of IC chips .
Larry Robinson Replies: 10 Views: 3326	Forum Section: Electronics Posted: 31 Mar 2012 8:45 am Subject: Help please on placement of IC chips .
Larry Robinson Replies: 10 Views: 3326	Mouser Electronics has the chips. You can look at their catalog for prices. I would replace those 4558's with the 2134 chips. I replace the 4558 chips in my Bandit 65 with the OPA2134' with no probl ...
Topic: Question for the tube guru's
Larry Robinson Replies: 3 Views: 858	Forum Section: Electronics Posted: 9 Feb 2012 2:10 pm Subject: Question for the tube guru's
Larry Robinson Replies: 3 Views: 858	I would buy one tube made by the same mfg. as the other el84's. Check that it isn't glowing cherry red after you plug in the new tube. If it sounded good before you broke the tube, it will probably ...
Topic: Mystery JBL 12" Speaker
Larry Robinson Replies: 2 Views: 1168	Forum Section: Electronics Posted: 5 Jan 2012 11:43 am Subject: Mystery JBL 12" Speaker
Larry Robinson Replies: 2 Views: 1168	Visit the following site: http://lansingheritage.org/. I found photo's of the D-131 in the Lansing catalogs and they all had aluminum dust covers. I suspect someone had it re-coned by someone other ...
Topic: Concert Amp Question
Larry Robinson Replies: 6 Views: 1460	Forum Section: Electronics Posted: 23 Dec 2011 10:43 am Subject: Concert Amp Question
Larry Robinson Replies: 6 Views: 1460	I believe input 2 is attenuated 6db which accounts for th different levels.
Topic: Vibrosonic Bias Question
Larry Robinson Replies: 13 Views: 3441	Forum Section: Electronics Posted: 6 Dec 2011 6:16 am Subject: Vibrosonic Bias Question
Larry Robinson Replies: 13 Views: 3441	If the static current is 18ma then something is definitely wrong. Static current should be around 35-38 ma for each tube. Are you sure you measured the values correctly? I personally would not hack ...
Topic: Depth/Expand on the Evans. Whut they do?
Larry Robinson Replies: 17 Views: 4787	Forum Section: Electronics Posted: 13 Nov 2011 9:30 am Subject: Depth/Expand on the Evans. Whut they do?
Larry Robinson Replies: 17 Views: 4787	I have a copy of an old op instructions for Evans Amp which reads: Expand boosts lows and highs. Depth--Boosts lows and low mids; cuts some of the highs. Note: When using this control, you may need ...
Topic: Modulated Delay Pedal?
Larry Robinson Replies: 20 Views: 5498	Forum Section: Electronics Posted: 7 Nov 2011 9:36 am Subject: Modulated Delay Pedal?
Larry Robinson Replies: 20 Views: 5498	The Digitech Hardwire DL-8 has modulated delay I think is quite good. This pedal is quiet and has other features as well.
Topic: Clean volume from tube amp
Larry Robinson Replies: 24 Views: 6974	Forum Section: Electronics Posted: 28 Oct 2011 3:06 am Subject: Clean volume from tube amp
Larry Robinson Replies: 24 Views: 6974	David, the value of the cap should be 22 mfd, not 0.22. It's sole purpose is to keep the bias voltage constant.
Topic: Clean volume from tube amp
Larry Robinson Replies: 24 Views: 6974	Forum Section: Electronics Posted: 27 Oct 2011 2:04 pm Subject: Clean volume from tube amp
Larry Robinson Replies: 24 Views: 6974	The resistor is there to provide bias for the tube(called cathode self bias). The cap (cathode bypass cap) keeps the voltage constant across the resistor. if you remove the cap, degeneration is introd ...
Topic: looking to buy 1or 2 - 12" speaker cabs
Larry Robinson Replies: 1 Views: 571	Forum Section: Wanted To Buy Posted: 19 Sep 2011 6:58 am Subject: looking to buy 1or 2 - 12" speaker cabs
Larry Robinson Replies: 1 Views: 571	I have a custom built open back speaker cab. I presently have EVM-12S installed in it. I'll sell the cab for $140 + shipping cost. Photo on request. Larry Robinson
Topic: Wtb Jbl E120
Larry Robinson Replies: 5 Views: 1262	Forum Section: Wanted To Buy Posted: 6 Sep 2011 5:41 am Subject: Wtb Jbl E120
Larry Robinson Replies: 5 Views: 1262	I have a JBL E-120 8 ohm speaker mounted in a Marrs cabinet. Cost is $275 + shipping cost. Email me for photos if interested.