Dating transformers fender amps,
Neck now has a very thin "D" backshape. I remember two 'suits' from upstairs standing behind me occasionally doing time studies. The body was routed somewhat like a Thinline Telecaster, with major wood areas removed underneath the pickguard.
Sunburst finish done on a small batch of Telecasters, and then discontinued. String ferrules on back now stick out, no longer flush.
Additionally we apply a couple of mods to get more compression, sag and breakup at lower volumes. Then wire the ground switch in series with the NBF resistor.
Converting to cathode bias in the blackface and silverface Bassman circuits, and other Fender amps with fixed bias, is very simple. It would have been very costly to destroy these units so two remedies were implemented.
How old is my vintage amplifier? – Ampwares
Body date in neck pocket. Distortion is for many tube amp guys considered a good thing since it makes the tone thicker, fuller and with more sustain. The first few models have a peghead logo the same as a regular Telecaster.
Next, if applicable look for the date code on the tube chart.
The source-date code on a speaker. The NBF theory is that you take the signal from the speaker output, let it go through a resistor and mix it in at the entry point of the phase inverter.
You get the most effect of this mod by disconnecting the NFB loop entirely. February "NoCaster" specs: For now, the dating schemes for these series are: We will further focus mostly on the AB vs AA On 3 digit date codes, you have to "guess" the decade of the pot or speaker. If one experiences more noise with pulling one tube, we suggest to put it back.
How the Source-Date Code Works. Still using one string tree on the peghead two string trees started around A new style 3 way switch was used. Electronic components such as transformers, potentiometers, speakers, and some capacitors are often stampted with a date code indicating who manufactured them and when.
For example, the serial numbers for 5F6 and 5F6-A Bassman amps run from BM to BM therefore we can conclude that there were about 4, units made.
With the changes noted below, the "pre-CBS" era is over. The best estimate is that about of these were made before the circuit was revised.
Also the fourth nail positioned on the cutaway was dropped. Since I primarily collect amps by Fender, and guitars by Gibson, Fender, Martin, National, Epiphone, Gretsch and Rickenbacker, I really can't help them with these other less popular brands.
The remaining 3 or 4 digits are the date code. Gibson didn't start using pots with source-date codes till or Neck screws change from being partially threaded, to being fully threaded their Dating transformers fender amps length.