Re: [Repeater-Builder] Micor Amp TLD1693 and I'm Confused
If you want the amplifier to be resonate in a split for which it was not designed, you have to change the resonating parts. If you do not want the amplifier to be resonate, do not change the resonating parts. If I drive a 80 Meter amplifier hard enough with a 40 Meter signal, you will get a 40 Meter signal out, but the amplifier is not resonate. If you resonate the amplifier, the current drawn goes down and heat produced goes down for a specified output. The Micor amplifier used transistors that were not constant impedance. As you shift the amplifier from resonance, current goes up, heat goes up, power goes down and spurious products go up as the impedance of the transistor changes. The reason Motorola designed the amplifier in four ranges to cover 136 to 174 was to keep the impedance of the stages correct over the frequency range. You can become a good neighbor and operate the amplifier at resonance, or you can operate it off resonance and stand a good chance of helping to deny hams access to other towers owned by the company that is providing you tower space. My suggestion is operate the amplifier at resonance, keep your power bill down, keep your repair costs down and become a good neighbor to the other users of the RF spectrum. 73 Glenn WB4UIV At 01:28 PM 06/02/04, you wrote: Try using a short piece of 75 ohm feedline and watch the smoke come from the caps over the finals - your existing phase detector won't work well off the laboratory test bench. Most of the caps need to be increased slightly and the two blocks which are bandpass filters will need to be changed or modded to allow the full potential to reach the phase detector located next to the output port, make sure you have a 80-110 watt phase detector board in place before you hike to the repeater site and connect. w9mwq wrote: I have a Micor TLD1693 amp, designed for the 150 to 162 Mhz range, and am told that the amp will not operate at the 146 Mhz range, told that componets have to be changed. Here is what I don't understand about it, maybe someone can help expain it. Into a Cushman serive monitor, I'm getting 100 Watts out of the amp at both 146.925 and 154.115 Mhz, keyed down the temperature is the same after a 5 min keyup test, allowed to cool down for each test. I see no spikes or spurs at either frequency. Granted this will be used on a repeater and key down times can go much longer, but why would this amp not operate at 2 meters, just cause Motorola says the specs are for 150 to 162. I've seen amps go from 138 to 174 with no problems, just a matter of tweaking. So help me to understand what the difference really is between the TLD1693 and the TLD1692 amps. Thanks. Mathew Yahoo! Groups Links -- 73...Clark Beckman N8PZD Pursuant to U.S. Code, title 47, Chapter 5, Subchapter II, ß227, Any and all nonsolicited commercial E-mail sent to this address is subject to a download and archival fee of $500.00 U.S.. E-mailing denotes acceptance of these terms. Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Micor Amp TLD1693 and I'm Confused
Re-read what Larry (L7LJ) wrote. They will work fine for a few months, then they acting strange. w9mwq [EMAIL PROTECTED] wrote: I have a Micor TLD1693 amp, designed for the 150 to 162 Mhz range, and am told that the amp will not operate at the 146 Mhz range, told that componets have to be changed. Here is what I don't understand about it, maybe someone can help expain it. Into a Cushman serive monitor, I'm getting 100 Watts out of the amp at both 146.925 and 154.115 Mhz, keyed down the temperature is the same after a 5 min keyup test, allowed to cool down for each test. I see no spikes or spurs at either frequency. Granted this will be used on a repeater and key down times can go much longer, but why would this amp not operate at 2 meters, just cause Motorola says the specs are for 150 to 162. I've seen amps go from 138 to 174 with no problems, just a matter of tweaking. So help me to understand what the difference really is between the TLD1693 and the TLD1692 amps. Thanks. Mathew Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] Micor Amp TLD1693 and I'm Confused
Try using a short piece of 75 ohm feedline and watch the smoke come from the caps over the finals - your existing phase detector won't work well off the laboratory test bench. Most of the caps need to be increased slightly and the two blocks which are bandpass filters will need to be changed or modded to allow the full potential to reach the phase detector located next to the output port, make sure you have a 80-110 watt phase detector board in place before you hike to the repeater site and connect. w9mwq wrote: I have a Micor TLD1693 amp, designed for the 150 to 162 Mhz range, and am told that the amp will not operate at the 146 Mhz range, told that componets have to be changed. Here is what I don't understand about it, maybe someone can help expain it. Into a Cushman serive monitor, I'm getting 100 Watts out of the amp at both 146.925 and 154.115 Mhz, keyed down the temperature is the same after a 5 min keyup test, allowed to cool down for each test. I see no spikes or spurs at either frequency. Granted this will be used on a repeater and key down times can go much longer, but why would this amp not operate at 2 meters, just cause Motorola says the specs are for 150 to 162. I've seen amps go from 138 to 174 with no problems, just a matter of tweaking. So help me to understand what the difference really is between the TLD1693 and the TLD1692 amps. Thanks. Mathew Yahoo! Groups Links -- 73...Clark Beckman N8PZD Pursuant to U.S. Code, title 47, Chapter 5, Subchapter II, ß227, Any and all nonsolicited commercial E-mail sent to this address is subject to a download and archival fee of $500.00 U.S.. E-mailing denotes acceptance of these terms. Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Micor Amp TLD1693 and I'm Confused
I have a Micor TLD1693 amp, designed for the 150 to 162 Mhz range, and am told that the amp will not operate at the 146 Mhz range, told that componets have to be changed. Here is what I don't understand about it, maybe someone can help expain it. Into a Cushman serive monitor, I'm getting 100 Watts out of the amp at both 146.925 and 154.115 Mhz, keyed down the temperature is the same after a 5 min keyup test, allowed to cool down for each test. I see no spikes or spurs at either frequency. Granted this will be used on a repeater and key down times can go much longer, but why would this amp not operate at 2 meters, just cause Motorola says the specs are for 150 to 162. I've seen amps go from 138 to 174 with no problems, just a matter of tweaking. So help me to understand what the difference really is between the TLD1693 and the TLD1692 amps. Thanks. Mathew Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
