Awhile back I purchased a set of Landwehr Preamps, for 2 and 70cm. I just got around to setting them up in my station in NJ. Both are DOA, so now I'm trying to fix them. Does anyone know where I can get a schematic, or anyone that can fix these that has the parts. Both units relay are function 100%, issue is with the rx on both units. The 70cm one shows hi SWR and low RX, the 2m one no preamp, or low RX. I'm sure both will need preamp chips, I'm not sure these are available anymore on the open market..
73 Jeff kb2m
Jeff,
Will send you a copy of the 2 m manual, which includes a schematic. It is probably very similar to the 70 cm version, except for some circuit values.
73s,
Alan WA4SCA
<-----Original Message----- <From: AMSAT-BB [mailto:amsat-bb-bounces@amsat.org] On Behalf Of Jeff <Griffin <Sent: Thursday, June 08, 2017 11:30 AM <To: 'AMSAT-BB' AMSAT-BB@amsat.org <Subject: [amsat-bb] Landwehr pre amp < <Awhile back I purchased a set of Landwehr Preamps, for 2 and 70cm. I just <got around to setting them up in my station in NJ. Both are DOA, so now I'm <trying to fix them. Does anyone know where I can get a schematic, or anyone <that can fix these that has the parts. Both units relay are function 100%, <issue is with the rx on both units. The 70cm one shows hi SWR and low RX, <the 2m one no preamp, or low RX. I'm sure both will need preamp chips, I'm <not sure these are available anymore on the open market.. < < < <73 Jeff kb2m < < < < < <_______________________________________________ <Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available <to all interested persons worldwide without requiring membership. Opinions <expressed <are solely those of the author, and do not reflect the official views of AMSAT- <NA. <Not an AMSAT-NA member? Join now to support the amateur satellite <program! <Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Always talk to Dr Google first.Landwehr mast mounted preamps
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--- Ciao baby, catch you on the flip side. GEO
Time flies like an arrow, fruit flies like a banana.
From: Jeff Griffin kb2m@arrl.net To: 'AMSAT-BB' AMSAT-BB@amsat.org Sent: Thursday, June 8, 2017 9:31 AM Subject: [amsat-bb] Landwehr pre amp
Awhile back I purchased a set of Landwehr Preamps, for 2 and 70cm. I just got around to setting them up in my station in NJ. Both are DOA, so now I'm trying to fix them. Does anyone know where I can get a schematic, or anyone that can fix these that has the parts. Both units relay are function 100%, issue is with the rx on both units. The 70cm one shows hi SWR and low RX, the 2m one no preamp, or low RX. I'm sure both will need preamp chips, I'm not sure these are available anymore on the open market..
73 Jeff kb2m
_______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
I have no idea why the urls are stripped out. radiodan DOT com / ted_stuff / landwehr.htm
--- Ciao baby, catch you on the flip side. GEO
Time flies like an arrow, fruit flies like a banana.
From: GEO Badger via AMSAT-BB amsat-bb@amsat.org To: Jeff Griffin kb2m@arrl.net; 'AMSAT-BB' AMSAT-BB@amsat.org Sent: Thursday, June 8, 2017 9:44 AM Subject: Re: [amsat-bb] Landwehr pre amp
Always talk to Dr Google first.Landwehr mast mounted preamps
| | | Landwehr mast mounted preamps | |
|
--- Ciao baby, catch you on the flip side. GEO
Time flies like an arrow, fruit flies like a banana.
From: Jeff Griffin kb2m@arrl.net To: 'AMSAT-BB' AMSAT-BB@amsat.org Sent: Thursday, June 8, 2017 9:31 AM Subject: [amsat-bb] Landwehr pre amp Awhile back I purchased a set of Landwehr Preamps, for 2 and 70cm. I just got around to setting them up in my station in NJ. Both are DOA, so now I'm trying to fix them. Does anyone know where I can get a schematic, or anyone that can fix these that has the parts. Both units relay are function 100%, issue is with the rx on both units. The 70cm one shows hi SWR and low RX, the 2m one no preamp, or low RX. I'm sure both will need preamp chips, I'm not sure these are available anymore on the open market..
73 Jeff kb2m
_______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
_______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
That’s odd. I googled the same exact phrase(ALMOST) and didn’t get a hit on this site. This is the page I was looking for. W7RF has some remaining part’s for the Landwehrs. I bought some 5 pin power connectors off of him several years ago. Thank you W3AB, I guess J
73 Jeff kb2m
From: GEO Badger [mailto:w3ab@yahoo.com] Sent: Thursday, June 8, 2017 12:43 PM To: Jeff Griffin; 'AMSAT-BB' Subject: Re: [amsat-bb] Landwehr pre amp
Always talk to Dr Google first.
Landwehr mast mounted preamps https://www.radiodan.com/ted_stuff/landwehr.htm
Landwehr mast mounted preamps
--- Ciao baby, catch you on the flip side. GEO
Time flies like an arrow, fruit flies like a banana.
_____
From: Jeff Griffin kb2m@arrl.net To: 'AMSAT-BB' AMSAT-BB@amsat.org Sent: Thursday, June 8, 2017 9:31 AM Subject: [amsat-bb] Landwehr pre amp
Awhile back I purchased a set of Landwehr Preamps, for 2 and 70cm. I just
got around to setting them up in my station in NJ. Both are DOA, so now I'm
trying to fix them. Does anyone know where I can get a schematic, or anyone
that can fix these that has the parts. Both units relay are function 100%,
issue is with the rx on both units. The 70cm one shows hi SWR and low RX,
the 2m one no preamp, or low RX. I'm sure both will need preamp chips, I'm
not sure these are available anymore on the open market..
73 Jeff kb2m
Jeff, I also have the schematics and will send them to you. I noticed that radiodan has one (1) UHF FET left for sale, no VHF FETs --- Ciao baby, catch you on the flip side. GEO
Time flies like an arrow, fruit flies like a banana.
From: Jeff Griffin kb2m@arrl.net To: 'AMSAT-BB' AMSAT-BB@amsat.org Sent: Thursday, June 8, 2017 9:31 AM Subject: [amsat-bb] Landwehr pre amp
Awhile back I purchased a set of Landwehr Preamps, for 2 and 70cm. I just got around to setting them up in my station in NJ. Both are DOA, so now I'm trying to fix them. Does anyone know where I can get a schematic, or anyone that can fix these that has the parts. Both units relay are function 100%, issue is with the rx on both units. The 70cm one shows hi SWR and low RX, the 2m one no preamp, or low RX. I'm sure both will need preamp chips, I'm not sure these are available anymore on the open market..
73 Jeff kb2m
_______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
participants (4)
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Alan -
GEO Badger -
Jeff Griffin -
Jeff Griffin