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Crystal Frequencies, HR-2A
Hi folks.. Have a Regency HR-2A that I want to re-crystal for packet
use, but don't have the manual, and therefore do not have the formula for calculating the frequency of the receive and transmit crystals for desired frequency of operation. Could anyone out there help with this info? Hamfest coming up this weekend and I'd like to shop for crystals. Also, is there a .PDF of the manual available anywhere? I've searched the web and there are plenty of folks who'll sell me a photocopy of the manual for anywhere from $15.00 to $25.00, but to be honest, that would exceed the value of the radio... Any help would be greatly appreciated... Thanks much, and 73! Raymond Sirois KU2S SysOp: The Lost Chord BBS 607-733-5745 telnet://thelostchord.dns2go.com:6000 |
KU2S ) writes:
Hi folks.. Have a Regency HR-2A that I want to re-crystal for packet use, but don't have the manual, and therefore do not have the formula for calculating the frequency of the receive and transmit crystals for desired frequency of operation. Could anyone out there help with this info? Hamfest coming up this weekend and I'd like to shop for crystals. Also, is there a .PDF of the manual available anywhere? I've searched the web and there are plenty of folks who'll sell me a photocopy of the manual for anywhere from $15.00 to $25.00, but to be honest, that would exceed the value of the radio... Any help would be greatly appreciated... But you asked this question back in November here, and got some answers. If that wasn't enough, people have asked about the crystal frequencies before, I know I found them at the time you asked back in November. Go to http://www.groups.google.com and do some searching by yourself. Michael VE2BVW |
KU2S ) writes:
Hi folks.. Have a Regency HR-2A that I want to re-crystal for packet use, but don't have the manual, and therefore do not have the formula for calculating the frequency of the receive and transmit crystals for desired frequency of operation. Could anyone out there help with this info? Hamfest coming up this weekend and I'd like to shop for crystals. Also, is there a .PDF of the manual available anywhere? I've searched the web and there are plenty of folks who'll sell me a photocopy of the manual for anywhere from $15.00 to $25.00, but to be honest, that would exceed the value of the radio... Any help would be greatly appreciated... But you asked this question back in November here, and got some answers. If that wasn't enough, people have asked about the crystal frequencies before, I know I found them at the time you asked back in November. Go to http://www.groups.google.com and do some searching by yourself. Michael VE2BVW |
"KU2S" wrote in message ... Hi folks.. Have a Regency HR-2A that I want to re-crystal for packet use, but don't have the manual, and therefore do not have the formula for calculating the frequency of the receive and transmit crystals for desired frequency of operation. Could anyone out there help with this info? Hamfest coming up this weekend and I'd like to shop for crystals. Also, is there a .PDF of the manual available anywhere? I've searched the web and there are plenty of folks who'll sell me a photocopy of the manual for anywhere from $15.00 to $25.00, but to be honest, that would exceed the value of the radio... Any help would be greatly appreciated... Thanks much, and 73! Raymond Sirois KU2S SysOp: The Lost Chord BBS 607-733-5745 telnet://thelostchord.dns2go.com:6000 I know nothing about that rig, but in general you can check if any of the existing crystals are stamped with their actual operating frequency, and figure it out. I assume it's a two meter rig. Normally the transmit crystals will be some integer fraction of the transmit frequency, like 6 or 8 or 9, so a 144.0MHz transmit frequency would have a crystal frequency of 24MHz (6x), 18MHz (8x) or 16MHz (9x). Receive will be receive frequency +/- the IF frequency (almost certainly 10.7MHz), divided by some fraction, so 144MHz would be something like 19.338MHz ( (144 + 10.7)/8 ) or 16.663MHz ( (144 - 10.7)/8 ). This sounds daunting, but if you can noodle around with a calculator without loosing track (or use a spreadsheet!), you can figure it out. |
"KU2S" wrote in message ... Hi folks.. Have a Regency HR-2A that I want to re-crystal for packet use, but don't have the manual, and therefore do not have the formula for calculating the frequency of the receive and transmit crystals for desired frequency of operation. Could anyone out there help with this info? Hamfest coming up this weekend and I'd like to shop for crystals. Also, is there a .PDF of the manual available anywhere? I've searched the web and there are plenty of folks who'll sell me a photocopy of the manual for anywhere from $15.00 to $25.00, but to be honest, that would exceed the value of the radio... Any help would be greatly appreciated... Thanks much, and 73! Raymond Sirois KU2S SysOp: The Lost Chord BBS 607-733-5745 telnet://thelostchord.dns2go.com:6000 I know nothing about that rig, but in general you can check if any of the existing crystals are stamped with their actual operating frequency, and figure it out. I assume it's a two meter rig. Normally the transmit crystals will be some integer fraction of the transmit frequency, like 6 or 8 or 9, so a 144.0MHz transmit frequency would have a crystal frequency of 24MHz (6x), 18MHz (8x) or 16MHz (9x). Receive will be receive frequency +/- the IF frequency (almost certainly 10.7MHz), divided by some fraction, so 144MHz would be something like 19.338MHz ( (144 + 10.7)/8 ) or 16.663MHz ( (144 - 10.7)/8 ). This sounds daunting, but if you can noodle around with a calculator without loosing track (or use a spreadsheet!), you can figure it out. |
I thought the regency's were... operating frequency minus 10.7Mhz divided
by ***3*** not 9! that would put the crystal around 45.0Mhz. The crystal IS a 3rd overtone..but should be in the 45 Mhz area....Eddie. "Tim Wescott" wrote in message ... "KU2S" wrote in message ... Hi folks.. Have a Regency HR-2A that I want to re-crystal for packet use, but don't have the manual, and therefore do not have the formula for calculating the frequency of the receive and transmit crystals for desired frequency of operation. Could anyone out there help with this info? Hamfest coming up this weekend and I'd like to shop for crystals. Also, is there a .PDF of the manual available anywhere? I've searched the web and there are plenty of folks who'll sell me a photocopy of the manual for anywhere from $15.00 to $25.00, but to be honest, that would exceed the value of the radio... Any help would be greatly appreciated... Thanks much, and 73! Raymond Sirois KU2S SysOp: The Lost Chord BBS 607-733-5745 telnet://thelostchord.dns2go.com:6000 I know nothing about that rig, but in general you can check if any of the existing crystals are stamped with their actual operating frequency, and figure it out. I assume it's a two meter rig. Normally the transmit crystals will be some integer fraction of the transmit frequency, like 6 or 8 or 9, so a 144.0MHz transmit frequency would have a crystal frequency of 24MHz (6x), 18MHz (8x) or 16MHz (9x). Receive will be receive frequency +/- the IF frequency (almost certainly 10.7MHz), divided by some fraction, so 144MHz would be something like 19.338MHz ( (144 + 10.7)/8 ) or 16.663MHz ( (144 - 10.7)/8 ). This sounds daunting, but if you can noodle around with a calculator without loosing track (or use a spreadsheet!), you can figure it out. |
I thought the regency's were... operating frequency minus 10.7Mhz divided
by ***3*** not 9! that would put the crystal around 45.0Mhz. The crystal IS a 3rd overtone..but should be in the 45 Mhz area....Eddie. "Tim Wescott" wrote in message ... "KU2S" wrote in message ... Hi folks.. Have a Regency HR-2A that I want to re-crystal for packet use, but don't have the manual, and therefore do not have the formula for calculating the frequency of the receive and transmit crystals for desired frequency of operation. Could anyone out there help with this info? Hamfest coming up this weekend and I'd like to shop for crystals. Also, is there a .PDF of the manual available anywhere? I've searched the web and there are plenty of folks who'll sell me a photocopy of the manual for anywhere from $15.00 to $25.00, but to be honest, that would exceed the value of the radio... Any help would be greatly appreciated... Thanks much, and 73! Raymond Sirois KU2S SysOp: The Lost Chord BBS 607-733-5745 telnet://thelostchord.dns2go.com:6000 I know nothing about that rig, but in general you can check if any of the existing crystals are stamped with their actual operating frequency, and figure it out. I assume it's a two meter rig. Normally the transmit crystals will be some integer fraction of the transmit frequency, like 6 or 8 or 9, so a 144.0MHz transmit frequency would have a crystal frequency of 24MHz (6x), 18MHz (8x) or 16MHz (9x). Receive will be receive frequency +/- the IF frequency (almost certainly 10.7MHz), divided by some fraction, so 144MHz would be something like 19.338MHz ( (144 + 10.7)/8 ) or 16.663MHz ( (144 - 10.7)/8 ). This sounds daunting, but if you can noodle around with a calculator without loosing track (or use a spreadsheet!), you can figure it out. |
"Eddie Haskel" wrote in message . com... I thought the regency's were... operating frequency minus 10.7Mhz divided by ***3*** not 9! that would put the crystal around 45.0Mhz. The crystal IS a 3rd overtone..but should be in the 45 Mhz area....Eddie. "Tim Wescott" wrote in message ... "KU2S" wrote in message ... Hi folks.. Have a Regency HR-2A that I want to re-crystal for packet use, but don't have the manual, and therefore do not have the formula for calculating the frequency of the receive and transmit crystals for desired frequency of operation. Could anyone out there help with this info? Hamfest coming up this weekend and I'd like to shop for crystals. Also, is there a .PDF of the manual available anywhere? I've searched the web and there are plenty of folks who'll sell me a photocopy of the manual for anywhere from $15.00 to $25.00, but to be honest, that would exceed the value of the radio... Any help would be greatly appreciated... Thanks much, and 73! Raymond Sirois KU2S SysOp: The Lost Chord BBS 607-733-5745 telnet://thelostchord.dns2go.com:6000 I know nothing about that rig, but in general you can check if any of the existing crystals are stamped with their actual operating frequency, and figure it out. I assume it's a two meter rig. Normally the transmit crystals will be some integer fraction of the transmit frequency, like 6 or 8 or 9, so a 144.0MHz transmit frequency would have a crystal frequency of 24MHz (6x), 18MHz (8x) or 16MHz (9x). Receive will be receive frequency +/- the IF frequency (almost certainly 10.7MHz), divided by some fraction, so 144MHz would be something like 19.338MHz ( (144 + 10.7)/8 ) or 16.663MHz ( (144 - 10.7)/8 ). This sounds daunting, but if you can noodle around with a calculator without loosing track (or use a spreadsheet!), you can figure it out. As I said, I know nothing of Regencies in particular, just that the usual circuit is an oscillator followed by a multiplier chain. Sounds like maybe you know the formula for this guy to use for his radio? |
"Eddie Haskel" wrote in message . com... I thought the regency's were... operating frequency minus 10.7Mhz divided by ***3*** not 9! that would put the crystal around 45.0Mhz. The crystal IS a 3rd overtone..but should be in the 45 Mhz area....Eddie. "Tim Wescott" wrote in message ... "KU2S" wrote in message ... Hi folks.. Have a Regency HR-2A that I want to re-crystal for packet use, but don't have the manual, and therefore do not have the formula for calculating the frequency of the receive and transmit crystals for desired frequency of operation. Could anyone out there help with this info? Hamfest coming up this weekend and I'd like to shop for crystals. Also, is there a .PDF of the manual available anywhere? I've searched the web and there are plenty of folks who'll sell me a photocopy of the manual for anywhere from $15.00 to $25.00, but to be honest, that would exceed the value of the radio... Any help would be greatly appreciated... Thanks much, and 73! Raymond Sirois KU2S SysOp: The Lost Chord BBS 607-733-5745 telnet://thelostchord.dns2go.com:6000 I know nothing about that rig, but in general you can check if any of the existing crystals are stamped with their actual operating frequency, and figure it out. I assume it's a two meter rig. Normally the transmit crystals will be some integer fraction of the transmit frequency, like 6 or 8 or 9, so a 144.0MHz transmit frequency would have a crystal frequency of 24MHz (6x), 18MHz (8x) or 16MHz (9x). Receive will be receive frequency +/- the IF frequency (almost certainly 10.7MHz), divided by some fraction, so 144MHz would be something like 19.338MHz ( (144 + 10.7)/8 ) or 16.663MHz ( (144 - 10.7)/8 ). This sounds daunting, but if you can noodle around with a calculator without loosing track (or use a spreadsheet!), you can figure it out. As I said, I know nothing of Regencies in particular, just that the usual circuit is an oscillator followed by a multiplier chain. Sounds like maybe you know the formula for this guy to use for his radio? |
"KU2S" wrote in message ... Hi folks.. Have a Regency HR-2A that I want to re-crystal for packet use, but don't have the manual, and therefore do not have the formula for calculating the frequency of the receive and transmit crystals for desired frequency of operation. Could anyone out there help with this info? Hamfest coming up this weekend and I'd like to shop for crystals. Also, is there a .PDF of the manual available anywhere? The receiver is the standard of desired frequency - 10.7 mhz and then devide by 3. This gives you a frequecny of about 45 mhz for the crystal. The transmitt frequency is devided by 24 if you have a HR2A,212 or MS . This is about 6 mhz. If you have a HR2B then you devide by 18. Not sure if you will have any luck for the crystals for packet as that is usually below 146 mhz and the old Regencys were made before anythig bleow 146 mhz was in common use. |
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