emergency advice needed help!

[ColinKeb]

i have just started the mash for mysterios recipe for ;
Biere de Garde

Type: All Grain
Date: 28/12/2006
Batch Size: 5.00 Imp gal
Brewer: Geoff
Boil Size: 5.72 Imp gal Asst Brewer:
Boil Time: 90 min Brewhouse Efficiency: 70.0

Ingredients

Amount Item Type % or IBU
6.10 kg Vienna Malt (6.9 EBC) Grain 92.4 %
0.30 kg Caramel/Crystal Malt - 60L (118.2 EBC) Grain 4.5 %
0.20 kg Aromatic Malt (51.2 EBC) Grain 3.0 %
30.00 gm Pearle [8.00%] (60 min) Hops 23.6 IBU
15.00 gm Saaz [4.00%] (15 min) Hops 2.9 IBU
15.00 gm Saaz [4.00%] (0 min) Hops -
1 Pkgs European Ale (White Labs #WLP011) Yeast-Ale

Beer Profile

Est Original Gravity: 1.060 SG
Est Final Gravity: 1.015 SG
Est Alcohol by Vol: 5.9 %
Bitterness: 26.5 IBU Calories: 269 cal/pint
Est Color: 20.0 EBC Color: Color

now first major cock up today apart from barking my toe on the brewing bin is ...(youre not going to believe this) ...i need 30grms of pearl hops i have 300grms of pearl barley

i have the saaz (125 grms)hops thank god, but the only other ones ive got are some styrian goldings (1 1/2 oz)and a few loose goldings (about 1 oz), cant get to a brew shop now , any ideas? bung in the styrian or leave them out? make up the rest with the saaz?

and yes i know im a plonker , im a plonker with a bleeding toe . good start to the day eh?

[tubby_shaw]

Go with 60g of Saaz to replace the Perle.
The flavour will not be as the recipe but it should still be nice
BTW steel toe cap boots can be had new for £8

[steve_flack]

As the Perle's would have been bittering hops, you'll be fine using any of the other hops as replacements so long as the IBU stays the same. As styrians are usually about 5% alpha, 1 1/2 oz is about right as is 60g of additional saaz.

[steve_flack]

In my book it suggests replacements of Northern Brewer, Cluster or Tetnang.

Generally Biere de Garde uses noble European hops which only one of those is. Not that it's really important in this case as Northern brewer and cluster are pretty clean hops. Just don't use Target

The actual usual hop for these beers is Streisselspalter - but I don't think that's available in HB shops here. It's fairly similar to Hallertau Hersbrucker.

[ColinKeb]

cheers ! youve saved my day . i presumed that when you adjust hops to get the same bitterness you go by the alpha % , so if pearl is 8% and im using saaz which is 4% you would just double it ? or have i got that wrong?

[tubby_shaw]

Absolutely right colin
As DaaB said

(aa% of old hops/aa% of substitute hops)xold weight=new weight of substitue

So if you had used say Goldings at 4.4% aa it would have been (8/4.4)*30 = 54.5g
Easy

[ColinKeb]

cheers

BTW steel toe cap boots can be had new for £8

i already have a pair, thats what i tripped over before landing on the bucket my kitchen is about 2m x 1m