This is one of the most common questions I get, and usually it’s not hard to sort out once you know what to look for. 

The first thing to start with is the amp itself, not just the general name. 

“Deluxe,” “Princeton,” or “Bassman” is not always enough on its own. What really matters is the 
circuit family, the era, and whether you’re trying to stay vintage-correct or just get the amp back up and running with a practical board that fits. 

A good place to start is this:

Start with the amp model and circuit

Best case, you know the model and the circuit. If not, start with: 
● the amp model 
● the approximate year 
● whether it’s Blackface, Silverface, Tweed, Brown, or Blonde 
● whether the amp looks original or has already been modified 

That last one matters more than people think. A lot of older amps have already been changed at some point, so what the amp started as and what’s in it now are not always the same. 

Figure out what type of board you actually need

Not every order is a full main board. 
Sometimes you need: 
● a main eyelet board 
● a bias board 
● a rectifier or diode board 
● a capacitor board 
● a full board set 
Starting there helps narrow things down quickly.

Check the dimensions

This is one of the biggest ones. 

Even when the circuit family is right, you still want to check the dimensions in the listing. Some boards have multiple variations. Some are vintage-correct. Some are retrofit versions. 

That’s why I always recommend reading the description and confirming the measurements before ordering. 

Decide whether you want vintage-correct or practical retrofit 

Sometimes the right board is the one that matches the original layout as closely as possible. 

Other times the right board is the one that fits the real amp in front of you and makes the rebuild easier. 

Neither approach is automatically better. It depends on the amp, the goal, and how original you want to keep things. 

If you’re not sure, ask 

If you’re unsure, it’s usually faster to send a quick message than to guess. 

A photo of the existing board or the inside of the amp usually helps sort it out pretty quickly, especially if the amp has already been modified or partially rebuilt. 

The short version is: 
● start with the exact amp and circuit if you know it 
● make sure you’re looking at the right type of board 
● check the dimensions 
● pay attention to vintage-correct vs retrofit notes 
● if you’re unsure, reach out before ordering 
That usually gets you to the right board the first time.