I've always done 100 grams dme to 1 liter water. Don't have his book, but most say the starters gravity should be about 1.040.

 

Ditto. I'll have to check the reference.

 

Likely a misprint. Should be a quart to a half cup DME. Use the 10g per 100 ml formula.

 

What edition of How to Brew is that from? From what I've seen, JP is very good at correcting misprints and mistakes.

 

That's the current one.

 

Unfortunately, the www is full of bad information, and JP's misprint or mistake just made matters worse. He's a trustworthy source, but mistakes do happen. Sorry you got run through the ringer on your first starter, but you're on the right path now.

 

I Used the following recipe from this site - it didn't work (due the the info in the first line, it seems my liquid yeast was dead after all) but even this site's info has a confusing amount of water listed. I have just pitched some cheap dried yeast into the flask - just to see what happens - and I may use that if it survives.

I got the snippet of info from here:
https://www.brewersfriend.com/2009/08/19/how-to-make-a-yeast-starter-og-1040/


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• If your yeast is old or past its expiration, stepping it up with a starter is safer, but you should always try to use the freshest yeast possible. Liquid yeast is pretty much completely dead after just under 5 months.
• Yeast pitch rates is a complicated subject, click here to read our article Yeast Pitch Rates Explained.

What you need to create a simple starter:

• Extra light DME (3-4oz)
• 1 quart water
• 4-6 quart sauce pan with lid
• Pyrex flask or a 1 gallon glass carboy
• Tin foil
• Room temperature liquid yeast or dry yeast that has been re hydrated in 95F-105F water

The process:

• Bring 1.5 quarts of water to a boil in the sauce pan.
• Measure 3-4 oz of DME and introduce this to the boiling water, stir well, boil 10-15 minutes.
• Remove from heat, placing lid on the sauce pan.
• The boiling process should have reduced the volume to ~1 quart.
• Cool the starter wort in a shallow, cold water bath or in the refrigerator until it reaches the target fermentation temperature of the beer you will brew with it.
• Once cool, pour the starter wort into a sanitized flask or carboy.
• Secure a piece of tin foil on the opening of the flask or carboy and shake vigorously to aerate the wort.
• Pitch the yeast (add yeast into the flask / carboy containing the aerated wort).
• Seal container with a clean piece of foil, or a cork fitted with an air lock.
• Place starter in a dark area where it can maintain the proper temperature for fermentation.

 

It'll be fine. Don't worry too much about the word "optimum," we never hit it. Go with fine. John's recipe was supposed to be for a one quart (1 liter) starter but it, either through his error or the publishers, went wrong. There's still a LOT of good information in his book (I've noticed a few other errors), so don't let the little things like this throw you.

 

I think it was a case of one person's typo being repeated by others. But your starter at 1.048 should be fine. It's close enough to work. Heck I'm sure everyone who made their starters with the incorrect very high gravity recipe in the book did ok, maybe slightly stressed the yeast.

 

If you just use the yeast calculator from this site, just plug in the volume of your starter and the amount of DME you need to hit 1.036 is listed, albeit in weight not volume. Simple.

I'm not a big fan of Palmer anyway, there are many ways to skin a cat or brew beer for that matter. For whatever reason his books are now elevated to brewing dogma. I have always taken the information from his book with a grain of salt. It was really useful when I first started brewing, but now that I have more experience, not so much.

 

I have no idea what the gravity of my starters are usually. Never seems to hurt me but they're definitely on the lower OG end.

 

Yeah I've never tested gravity on starter maybe if I had a refractometer I would but the hydrometer sample steels to much valuable yeast propagation wort. I eco the 100g DME / 1000ml of water easy on the brain that way...

These days my starter gravity is determined pretty much by my pre boil as I take my starters 10mins into the boil so can be as low as 1.035 or lower

 

https://propperstarter.com