Re: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters
Whoa there pardner! Useless? Don't know 'bout 'dat. It keeps the local electrical co-op very happy, even at idle current!! hi. Neil? Jump in anytime! Happy to have the input. R. On Wed, 21 Feb 2007 22:06:53 -0500, Ken Arck [EMAIL PROTECTED] wrote: At 06:38 PM 2/18/2007, you wrote: Hello WA6KLA??? It seems like this would be a good time for Neil Mckie to jump in give advice here. No one knows more about the old useless Moto gear! ---I was wondering what happened to Neil myself. I haven't seen (heard from) him since December Ken -- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/ Yahoo! Groups - Join or create groups, clubs, forums amp; communities. Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups - Join or create groups, clubs, forums amp; communities. is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters
At 06:38 PM 2/18/2007, you wrote: Hello WA6KLA??? It seems like this would be a good time for Neil Mckie to jump in give advice here. No one knows more about the old useless Moto gear! ---I was wondering what happened to Neil myself. I haven't seen (heard from) him since December Ken -- President and CTO - Arcom Communications Makers of the world famous RC210 Repeater Controller and accessories. http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net
Re: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters
The radio you have is probably an FSTR250, not 520... the IF is 455 kHz, not 10.7 so the filter crystals made by Comm. Spec will not work. I assume that you have the Sensicon A receiver, about 5 inches wide with a rather big IF filter, about 4x4x2. If the last letter on the filter is an S it is 5KHz width. if not, it's 15 KHZ.Changing the resistor between the plates of the 6AL5 Discriminator tube to a higher value.. 180K??? if memory serves correct,,will give you more audio recovery. Although the TU540S filter offered is incorrect for the receiver, it can be made to work in the older Sensicon by adjusting the gain of the IF amp. Lance N2HBA - Original Message - From: Eric Lemmon To: Repeater-Builder@yahoogroups.com Sent: Saturday, February 17, 2007 8:09 PM Subject: RE: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters Dick, I think you're right about the bandwidth. Communications Specialists, one of the first companies to enter the narrow-banding market, is still in the same business. Com-Spec just might have the filter kit needed. Go here: www.com-spec.com/narrow.htm 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Dick Sent: Saturday, February 17, 2007 2:50 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters If memory serves, that radio is old enough to be a wideband rig (+/- 15 kHz FM deviation). You can turn down the XMTR FM dev to +/- 5 kHz, but your receiver's bandwidth is more complex to narrow it down to +/- 5 KHz. As it is now, you're nowhere near filling up its RCV bandwidth, so the remaining RCVR bandwidth lets noise through. There used to be some parts around that you could replace in the RCVR to narrowband (+/- 5 KHz), but I suspect they'd be nearly impossible to find now. You might be better off digging up a more modern RCVR and using it. 73, Dick - Original Message - From: rod_shaner [EMAIL PROTECTED] mailto:kb8fly%40copper.net To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: 17 February, 2007 11:29 Subject: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters Hi all, I'm seeking schematics, manuals, and advice on peaking a working unit. Its model number is FSTR520BR(FW)1ASP2. Just tearing that model number apart is a workload! It was a commercial base radio, and it's crystalled for 52.525 FM. Right now I'm trying to get as much as possible out of the receiver. It works, but 25 mile away 40W signal radiated through a vertical antenna is just out of the noise on this end. My receive antenna's base is 30 inches off the ground for test purposes. Advice is requested. Thanks
Re: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters
How about this: Filter number on I.F. is K-8436-A. Possibly K-6436-A (hard to resolve whether it's an eight or a six.) Another idea: How about using enough preamps that the selectivity is increased and sensitivity (spread) is decreased? As I understand it, the receiver is too broadbanded at present by a factor of 3. R. On Sat, 17 Feb 2007 17:50:09 -0500, Dick [EMAIL PROTECTED] wrote: If memory serves, that radio is old enough to be a wideband rig (+/- 15 KHz FM deviation). You can turn down the XMTR FM dev to +/- 5 KHz, but your receiver's bandwidth is more complex to narrow it down to +/- 5 KHz. As it is now, you're nowhere near filling up its RCV bandwidth, so the remaining RCVR bandwidth lets noise through. There used to be some parts around that you could replace in the RCVR to narrowband (+/- 5 KHz), but I suspect they'd be nearly impossible to find now. You might be better off digging up a more modern RCVR and using it. 73, Dick - Original Message - From: rod_shaner [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: 17 February, 2007 11:29 Subject: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters Hi all, I'm seeking schematics, manuals, and advice on peaking a working unit. Its model number is FSTR520BR(FW)1ASP2. Just tearing that model number apart is a workload! It was a commercial base radio, and it's crystalled for 52.525 FM. Right now I'm trying to get as much as possible out of the receiver. It works, but 25 mile away 40W signal radiated through a vertical antenna is just out of the noise on this end. My receive antenna's base is 30 inches off the ground for test purposes. Advice is requested. Thanks. -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/ Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * 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] 1953 Motorola BaseRadio for 6meters
What is the IF for this 1953 Motorola 520BR rig? 2.9MHz?? R. On Sat, 17 Feb 2007 20:09:50 -0500, Eric Lemmon [EMAIL PROTECTED] wrote: www.com-spec.com/narrow.htm -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/ Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * 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] 1953 Motorola BaseRadio for 6meters
Hello WA6KLA??? It seems like this would be a good time for Neil Mckie to jump in give advice here. No one knows more about the old useless Moto gear! -- Original Message -- Received: Sun, 18 Feb 2007 02:43:03 PM CST From: Rod Shaner [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters How about this: Filter number on I.F. is K-8436-A. Possibly K-6436-A (hard to resolve whether it's an eight or a six.) Another idea: How about using enough preamps that the selectivity is increased and sensitivity (spread) is decreased? As I understand it, the receiver is too broadbanded at present by a factor of 3. R. On Sat, 17 Feb 2007 17:50:09 -0500, Dick [EMAIL PROTECTED] wrote: If memory serves, that radio is old enough to be a wideband rig (+/- 15 KHz FM deviation). You can turn down the XMTR FM dev to +/- 5 KHz, but your receiver's bandwidth is more complex to narrow it down to +/- 5 KHz. As it is now, you're nowhere near filling up its RCV bandwidth, so the remaining RCVR bandwidth lets noise through. There used to be some parts around that you could replace in the RCVR to narrowband (+/- 5 KHz), but I suspect they'd be nearly impossible to find now. You might be better off digging up a more modern RCVR and using it. 73, Dick - Original Message - From: rod_shaner [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: 17 February, 2007 11:29 Subject: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters Hi all, I'm seeking schematics, manuals, and advice on peaking a working unit. Its model number is FSTR520BR(FW)1ASP2. Just tearing that model number apart is a workload! It was a commercial base radio, and it's crystalled for 52.525 FM. Right now I'm trying to get as much as possible out of the receiver. It works, but 25 mile away 40W signal radiated through a vertical antenna is just out of the noise on this end. My receive antenna's base is 30 inches off the ground for test purposes. Advice is requested. Thanks. -- Using Opera's revolutionary e-mail client: http://www.opera.com/mail/ Yahoo! Groups Links
[Repeater-Builder] 1953 Motorola BaseRadio for 6meters
Hi all, I'm seeking schematics, manuals, and advice on peaking a working unit. Its model number is FSTR520BR(FW)1ASP2. Just tearing that model number apart is a workload! It was a commercial base radio, and it's crystalled for 52.525 FM. Right now I'm trying to get as much as possible out of the receiver. It works, but 25 mile away 40W signal radiated through a vertical antenna is just out of the noise on this end. My receive antenna's base is 30 inches off the ground for test purposes. Advice is requested. Thanks.
Re: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters
If memory serves, that radio is old enough to be a wideband rig (+/- 15 KHz FM deviation). You can turn down the XMTR FM dev to +/- 5 KHz, but your receiver's bandwidth is more complex to narrow it down to +/- 5 KHz. As it is now, you're nowhere near filling up its RCV bandwidth, so the remaining RCVR bandwidth lets noise through. There used to be some parts around that you could replace in the RCVR to narrowband (+/- 5 KHz), but I suspect they'd be nearly impossible to find now. You might be better off digging up a more modern RCVR and using it. 73, Dick - Original Message - From: rod_shaner [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: 17 February, 2007 11:29 Subject: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters Hi all, I'm seeking schematics, manuals, and advice on peaking a working unit. Its model number is FSTR520BR(FW)1ASP2. Just tearing that model number apart is a workload! It was a commercial base radio, and it's crystalled for 52.525 FM. Right now I'm trying to get as much as possible out of the receiver. It works, but 25 mile away 40W signal radiated through a vertical antenna is just out of the noise on this end. My receive antenna's base is 30 inches off the ground for test purposes. Advice is requested. Thanks.
Re: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters
You will never be able to find a narrowbanding kit (15khz dev to 5khz dev) for that old a radio, but you might find already-narrowbanded exciter or receiver chassis. In the meantime, look on the side of the IF filter in the receiver and post the part number that you find. It will be either a single or two letters and 3 or 4 digits (i.e. P-9203, TU-540S, TCN6000, etc). Mike WA6ILQ At 02:50 PM 02/17/07, you wrote: If memory serves, that radio is old enough to be a wideband rig (+/- 15 KHz FM deviation). You can turn down the XMTR FM dev to +/- 5 KHz, but your receiver's bandwidth is more complex to narrow it down to +/- 5 KHz. As it is now, you're nowhere near filling up its RCV bandwidth, so the remaining RCVR bandwidth lets noise through. There used to be some parts around that you could replace in the RCVR to narrowband (+/- 5 KHz), but I suspect they'd be nearly impossible to find now. You might be better off digging up a more modern RCVR and using it. 73, Dick - Original Message - From: rod_shaner [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: 17 February, 2007 11:29 Subject: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters Hi all, I'm seeking schematics, manuals, and advice on peaking a working unit. Its model number is FSTR520BR(FW)1ASP2. Just tearing that model number apart is a workload! It was a commercial base radio, and it's crystalled for 52.525 FM. Right now I'm trying to get as much as possible out of the receiver. It works, but 25 mile away 40W signal radiated through a vertical antenna is just out of the noise on this end. My receive antenna's base is 30 inches off the ground for test purposes. Advice is requested. Thanks. Yahoo! Groups Links
RE: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters
Dick, I think you're right about the bandwidth. Communications Specialists, one of the first companies to enter the narrow-banding market, is still in the same business. Com-Spec just might have the filter kit needed. Go here: www.com-spec.com/narrow.htm 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Dick Sent: Saturday, February 17, 2007 2:50 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters If memory serves, that radio is old enough to be a wideband rig (+/- 15 kHz FM deviation). You can turn down the XMTR FM dev to +/- 5 kHz, but your receiver's bandwidth is more complex to narrow it down to +/- 5 KHz. As it is now, you're nowhere near filling up its RCV bandwidth, so the remaining RCVR bandwidth lets noise through. There used to be some parts around that you could replace in the RCVR to narrowband (+/- 5 KHz), but I suspect they'd be nearly impossible to find now. You might be better off digging up a more modern RCVR and using it. 73, Dick - Original Message - From: rod_shaner [EMAIL PROTECTED] mailto:kb8fly%40copper.net To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder%40yahoogroups.com Sent: 17 February, 2007 11:29 Subject: [Repeater-Builder] 1953 Motorola BaseRadio for 6meters Hi all, I'm seeking schematics, manuals, and advice on peaking a working unit. Its model number is FSTR520BR(FW)1ASP2. Just tearing that model number apart is a workload! It was a commercial base radio, and it's crystalled for 52.525 FM. Right now I'm trying to get as much as possible out of the receiver. It works, but 25 mile away 40W signal radiated through a vertical antenna is just out of the noise on this end. My receive antenna's base is 30 inches off the ground for test purposes. Advice is requested. Thanks
