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About JohnD

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  • Birthday 02/05/1977

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    Madison, WI

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  1. I've tended to do something like this most especially if I have fermenters that are taller than they are wide (H:D ratio higher than 1.2). I've had problems with tall and skinnies with CO2 being forced into solution by the weight of that mash that putting the yeast under additional stress. Particularly with grain-in mash I'm a fan of some agitation during the later stages of ferm. I've tried pump over but I think it's too stressful.
  2. Straining some of that oil out can help control astrigency in the finished spirit. I've found that the spirit can have a slightly rancid finish on a high wheat mash bill if I let all of that stay in, but I was working with a vodka so it may be less of an issue with a gin.
  3. JohnD

    Running plates

    I've always understood that you're better off using the plates that are closest to your partial condenser, so the higher plates. I think this probably leads to better control over the plates themselves as you adjust your reflux from above.
  4. Black currant leaves are pretty good with the right amount of sugar to balance.
  5. Can't figure out how to take the topic down so just noting here, this is sold.
  6. This system was acquired in 2012 and has never been used. It is essentially brand new equipment. Excellent condition. Asking $4200 for the conveyor and $7600 for the heat tunnel, or $11,500 for both. They are currently mounted together, but we can sell them separately if you just want one component. See photos below. Both pieces were originally sourced from Accutek. Brand Accutek Item Description Sanitary Conveyor Assembly 4 ½” wide stand alone Model Number 26-ST45-SA0 Serial Number A-17LO7-0585 Includes: • heavy duty stainless steel frame • wash down motor package • variable speed co
  7. This system was acquired in 2012 and has been used about eight times. It is essentially new and in excellent condition. It includes a 7.5 hp motor, gearbox and Waukesha Cherry-Burrell SPX positive displacement pump. Asking $12,500. Model: 060-UII Capacity per rev: 0.153 Gal. (0.579 Liter) Flow rate (nominal): 90 GPM (20.4 m³/hr.) Max Pressure: 300 PSI (20.7 bar) Features and Benefits Bi-directional flow Large diameter shafts for greater strength & stiffness Rotor/shaft connection sealed from the product zone Extended-life outer seal Mechanical seals standard 316 pump body sta
  8. Brand Lee Item Description 350 gallon stainless steel jacketed hemispherical kettle Capacity 350 gal Model Number 7520B Serial Number 453U Asking $9500. Kettle was built in 1971, but has been refurbished to great condition. Significant aftermarket improvements have been made to it, which include: · fabricate & install S.S. center bridge · fabricate & install S.S. lids · remove existing drain fitting · supply & install new 2 ½” T.C. drain fitting ·
  9. Brand Kreyer Item Description Glycol Chiller/Heater 4.4 Ton Model Number MCK110 This unit was acquired new one year ago and was never used. Asking $11,000. ($14,480 MSRP). Description: · Stainless steel, on casters · Compressor 6 kW, heater 3 kW; pump 1.44 kW · Digital thermostat controller for target temperature · Refrigerant R410A · Liquid tank: 110 L capacity; with level control sensor · Empty weight of chiller: 200 kg · Dimensions: 715 x 715 x 1375 mm · With two glycol hoses to connect to an exte
  10. There is language in the CFR about NGS and filtration. It's not something I understand but many people seem to be of the impression that some process is necessary to re-designate NGS as vodka. They often accomplish this through carbon filtration. I remember reading something about it but again, I don't really get it.
  11. I've run GC analysis of lots of NGS and it doesn't have any congeners in it if the producer has done their job properly. There may be some sloppy stuff on the market and I've smelled NGS that was shipped in a tote that had kerosine in it and was fouled, but you're getting 96% ethyl alcohol with almost nothing else. That's not to say that distilling it doesn't change the mouthfeel and flavor of NGS, it absolutely does but this is probably because the spirit has never seen copper and so has sulfur compounds in it. Those are removed by copper contact which improves the sensory qualities but this
  12. John, Have you seen any data on SA/V ratio of copper to liquid and sulfur binding or concentration of esters produced in distillation etc? I can't find anything and that always makes me mad. Someone has this info.
  13. All due respect John but as a fellow GCMS enthusiast I have to say that the differences in the pallet effect of a copper rectified NGS and non are pretty extreme. I was never able to confirm it analytically but my guess is that NGS having been produced on stainless equipment has sulfur compounds in it that are removed by the copper contact during rectification on a copper still. That's not to say that the entire still need be made from copper, I believe sulfur is removed at the point where vapor is condensed against the copper helmet or column.
  14. Might I suggest enabling a mobile forum tool for the forums? I use Tapatalk to follow and participate in other forums I'm a part of and the mobile notifications aspect makes it much easier for me to follow threads and participate. I'm not sure how the enabling process works but I've tried to add the ADI forum and I'm pretty certain something has to be done at the admin end to enable it. Thanks
  15. JohnD


    Did you get any solids settling out? I've done a cherry bourbon infusion that lost its cherry over time. I noticed sediment and guessed that the cherries either lowered the proof or the pH or both, allowed some oak solids to settle out of solution. I think this might have adsorbed some of the cherry flavor and sugars.
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