BF/SF Twin Reverb | BF/SF Twin Reverb |

Dating a twin reverb, all analogue signal path

Remember, this model shares a chassis with the narrow panel tweed Pro and Super. The plate voltage will increase a little when two of the tubes are removed. We also received a report of a tweed 5G12 Concert.

The whole dynamic area can be within a narrow interval, i. If you can't, read the above information again! Another interesting tidbit is Dating a twin reverb a lot of Fenders were imported into Australia in the late s and early s that were stock volt domestic US units. For instance, he confirmed our assumption that the amp chassis were put into stock after being stamped with serial numbers and that the chassis were pulled from the stock bins randomly just as with Fender guitar neck plates.

Again, these are rare and exceptions to the norm.

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Assuming they were all used sequentially and starting atthere would be around non-master volume silverface Twin Reverbs and Dual Showman Reverbs out there. Advances have been made with regards to the production of tolex amps and it appears that much of this information can be applied to late s tweed amps as well.

This mod suggests to entirly disconnect the tremolo circuit from the signal path by replacing the tremolo intensity pot with a switchabe pot spst. Some amps are sensitive and difficult to control the reverb on.

So does the reverb.

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In 3 digit dates code, the 1st digit is the last digit of the year. Warning nr 2 Volume and clean headroom. The bottom line is to do your homework or enlist the aid of an expert. The boss came around and said what we'd be building. The source-date code on a pot is a 6 or 7 digit code impressed into the casing of the potentiometer.

Twin Channel, High Gain Preamp Design

Pull out the V1 normal channel preamp tube — More preamp gain in vibrato channel. So simple as that. In a 50 year old vintage amp the condition of the speakers varies a lot. In addition to pulling the V1 tube, this mod is one of those must have mods which we never undo once having implemented it.

They were something to behold, all chatting away while soldering so quickly, it didn't hardly seem like they were looking at the amps.

A good thing with this mod is that you have both the tremolo pedal and spst pot to use. In either case, the code works the same.

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In addition, the dating-by-serial number tables have been revised and are more accurate. Plug your guitar into the vibrato channel, then unplug the reverb return cable on the back of the amp the one that comes from the reverb tank output and plug it into the normal channel input.

I just discovered that the silverface Bandmaster speaker cabinet the big, tall one without tilt-back legs is ported see photo.

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With all this information in mind, can you identify the following manufacturer and date of these source-date codes? As for the Super Reverb we would recommend the AB circuit as target if you attempt to blackface a silverface circuit. Logical schematics showing the AC If so, read more about the cap in the next bullet point.

The Australian Fender Distributor then installed V - V stepdown transformers in the bottom of the cabinets. With this in mind, remember if the last two digits of the source-date code are greater than 52, you're not looking at the source-date code!

First, the tables should Dating a twin reverb used as a guide only. Most importantly the tone gets rougher and rawer with more mids and higher frequencies, aka presence.

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The lowest suffix observed to date is A and the highest is A Increase the feedback loop resistance value.