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Gold Prospecting
Do It Yourself (DIY) Projects
(DIY) F1A4 Simple Mod information (hope it helps)
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<blockquote data-quote="Guest" data-source="post: 94130"><p>Quotes from a couple posts made on another forum regarding F1A4 Mods.. </p><p></p><p>The FI4A is a computer controlled unit and uses a LC circuit to set the frequency of the Transmit/Receive not a crystal. </p><p>The crystal on the board is the MCUs clock and what would happen if you change it is the Balance and running of the software would change accordingly, meaning it would be quicker to start up/balance or slower according to crystal frequency. </p><p></p><p>Overall no benefit would be obtained by doing this. To change the frequency of the detector would mean changing the LC circuit by changing either a capacitor or an Inductor.</p><p></p><p>Don't bother not worth your time/effort..</p><p></p><p>To change the transmitter timings find the 2 very small smt resisors near the eeprom and remove, cut the tracks under them to allow access to the address lines of the eeprom, by making these address lines high or low you can change the prom code to get different programs for the tx/ rx timings.</p><p></p><p>This one would be worth a try, IF i can get some info out of some of the more technically inclined on geotech.. (which is very hard) for an open source modding forum nobody seems all that open <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" /></p></blockquote><p></p>
[QUOTE="Guest, post: 94130"] Quotes from a couple posts made on another forum regarding F1A4 Mods.. The FI4A is a computer controlled unit and uses a LC circuit to set the frequency of the Transmit/Receive not a crystal. The crystal on the board is the MCUs clock and what would happen if you change it is the Balance and running of the software would change accordingly, meaning it would be quicker to start up/balance or slower according to crystal frequency. Overall no benefit would be obtained by doing this. To change the frequency of the detector would mean changing the LC circuit by changing either a capacitor or an Inductor. Don't bother not worth your time/effort.. To change the transmitter timings find the 2 very small smt resisors near the eeprom and remove, cut the tracks under them to allow access to the address lines of the eeprom, by making these address lines high or low you can change the prom code to get different programs for the tx/ rx timings. This one would be worth a try, IF i can get some info out of some of the more technically inclined on geotech.. (which is very hard) for an open source modding forum nobody seems all that open :( [/QUOTE]
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Gold Prospecting
Do It Yourself (DIY) Projects
(DIY) F1A4 Simple Mod information (hope it helps)
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