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Search results

  1. K

    Robert Hoolko

    Hi Friends, I wonder if this is the same Robert Hoolko who posted many fine comments and ideas on this forum in the past? Only 65, he had so much more to offer, all gone now, except for what he left on many forums. Obituary If it's not you Robert, please respond and correct...
  2. K

    Question for Eric, or Reg

    Hi, It appears that Rob's (RKC) Goldquest has a faulty sampling FET. I will replace both, but I'm wondering what's the best way to match them. I've searched the net, and experimented with the diode test function on one DMM while measuring the resistance on another. I'm wondering, if it's...
  3. K

    GQ V1 & V2 Coil Connectors Eric Please?

    Hi Eric, I'm wanting to wire RKC ( Rob's) Goldquest V1 coil connector the same as his Goldquest V2 so that all his coils are interchangable. I only have the V1 in my posession, so could you please relate A,B & C on the image to either TX, Rx and Ground. Thanks & Regards Kev.
  4. K

    Wee Goldquest mod for wee signals

    Hi, My hearing has accumulated some holes over the years, being assaulted in my youth with .303 rifle, shotgun and rock concerts etc., to name just a few. Anyway, my Goldquest had quite a low frequency threshold so I tried a slightly higher audio frequency which has proved more suitable...
  5. K

    Please Eric, what's the maximum Goldquest coil current ?

    Hi Eric, I've tried to find a datasheet for the Kynar coated wire used in the V1 GQ coils, but all in vain so far. I've used this same wire in some of my home brew coils too. I would like to add another coil drive transistor without series resistance, parallelled with the existing...
  6. K

    Keep an eye on your caps!

    Hi, I've seen a couple of GQs now that have had leaky, or failing main reservoir capacitors. This could be attributable to the
  7. K

    Less gnd noise at early times...

    Greetings, I was recently searching a place with some of the worst ground noise I've ever come across. It took lots of determination to remain focused on the threshold, but it paid off in the end. A nice little 4 gram specie came to light. It gives an SG figure of 75% gold. Some of the...
  8. K

    Another free feed

    Hi, When going over well hunted areas looking for nuggets, try to look for spots others pass by. I was working my way up a lead and not having much success, when two large rock masses (schist tors) rose up either side of the lead. Now every man and his dog had detected up the trail between...
  9. K

    Free lunch

    Hi, The old detector operator adage "dig em all!" does pay off especially when fossicking for gold. This is not one of those "dug a large 'obviously' trash signal and found a 2 oz nug
  10. K

    Being overly precise may not always be best!?

    Hi, I've been setting up a 15" DD coil, and decided to try balancing it correctly, rather than for ground rejection. I attached a 1.7kHz osillator to the Tx and checked the Rx on the scope. I was able to almost remove all but a very short 2mV ripple on the transient edges, by slightly...
  11. K

    www.datasheetcatalog.com

    Hi, Here's a good datasheet site if you're not already aware of it. I don't know how many times I followed a lead to a site where you're expected to register in order to view, I just hit the back button of course. Cheers Kev. http://www.datasheetcatalog.com/
  12. K

    Please Eric :please:

    Hi Eric, or is it Mr Toes, Been reading back a bit about the history of the PPD1 etc., Would it be possible to re-post the diagram of the front end of the PPD1 disc channel, originally posted here; http://www.findmall.com/read.php?34,129970,129970#msg-129970 It's a great resource this...
  13. K

    BFO with PI

    Hi, I was lying awake last night in the wee hours you know how you do, and my thoughts took me back to the first metal detector I ever made, it was a Beat Frequency Oscillator type. I have always been impressed by how well that machine worked, not so much the depth, because it was poor, but...
  14. K

    Alternating pulse width

    Hi, I think (?) I noticed something interesting with my GQ in the weekend, I need to check it out a bit more, but there could be some theory behind it? I've been altering the program on my riser card so that I can move the second earth field-eliminating sample closer to the first sample...
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