|
PLL Detector alignment 49 messages
Hello all, Anyone have any insight on peculiarities on aligning PLL detector tuners? I've received a KT-990SD with stubborn high levels of THD (0.15%-0.2%) in mono, stereo, wide, narrow. So far neithe
Hello all, Anyone have any insight on peculiarities on aligning PLL detector tuners? I've received a KT-990SD with stubborn high levels of THD (0.15%-0.2%) in mono, stereo, wide, narrow. So far neithe
|
By
Mike Miller
·
|
|
FM-3 Tuning Dial Lamp
Hello, Is there anyone in this group who can tell me what the value is of the bulb that illuminates the tuning dial? All I can find on it is T847. I've not had any luck locating it on the schematic ei
Hello, Is there anyone in this group who can tell me what the value is of the bulb that illuminates the tuning dial? All I can find on it is T847. I've not had any luck locating it on the schematic ei
|
By
Luther Goodman
·
|
|
FM iIF filter test fixtures for sale . 6 messages
I put out the active FM if filter test fitures for sale on eBay. Powered by OPA 838 amp with over 32MHz bandwidth. It was described in the very long thread about filter measurements. FM tuners forum m
I put out the active FM if filter test fitures for sale on eBay. Powered by OPA 838 amp with over 32MHz bandwidth. It was described in the very long thread about filter measurements. FM tuners forum m
|
By
M.K.
·
|
|
File Notifications
#file-notice
Radu Bogdan Dicher <vondicher@...> added folder /Sansui TU-S9 - Momentary Switch Replacement The following files and folders have been uploaded to the Files area of the FMtuners@groups.io group. /Sans
Radu Bogdan Dicher <vondicher@...> added folder /Sansui TU-S9 - Momentary Switch Replacement The following files and folders have been uploaded to the Files area of the FMtuners@groups.io group. /Sans
|
By
Group Notification
·
|
|
SDR Tuners 16 messages
I'm a bit of a lurker here, and I apologize for interrupting the 10.7 MHz ceramic filter threads. I noted with interest the new Mac MR89 at a mere $5.5K (I bought a demo MR78 in the 70s for about $800
I'm a bit of a lurker here, and I apologize for interrupting the 10.7 MHz ceramic filter threads. I noted with interest the new Mac MR89 at a mere $5.5K (I bought a demo MR78 in the 70s for about $800
|
By
Thomas
·
|
|
Sony ST-S444ESX Muting/Stereo control 8 messages
I've been playing with this Sony ST-S444ESX and I'm very disappointed on its Muting/Stereo control. I can't find any operating manuals for it, so can anyone confirm for me that they're tied? In other
I've been playing with this Sony ST-S444ESX and I'm very disappointed on its Muting/Stereo control. I can't find any operating manuals for it, so can anyone confirm for me that they're tied? In other
|
By
Radu Bogdan Dicher
·
|
|
Measuring and matching 10.7 MHz ceramic filters 282 messages
I did an experiment this weekend, throwing together a simple impedance-matching test circuit which allowed me to measure a few 10.7 MHz ceramic IF filters using my new NanoVNA-F analyzer. The circuit
I did an experiment this weekend, throwing together a simple impedance-matching test circuit which allowed me to measure a few 10.7 MHz ceramic IF filters using my new NanoVNA-F analyzer. The circuit
|
By
David Platt
·
|
|
Optimal resistors for min loss pad 50/330 or 330/50 matching
While doing a lot of work for the amplified filter jig i found a lot of the online calculators have calculation errors in them. The other problem is that one often needs to use at least 2 resistors to
While doing a lot of work for the amplified filter jig i found a lot of the online calculators have calculation errors in them. The other problem is that one often needs to use at least 2 resistors to
|
By
M.K.
·
|
|
Sony ST-J88B 8 messages
I was able to get a nice Sony ST-J88B, first impressions; Very sensitive tuner, more than my Phillips 673, Tandberg 3001A, and those tuners are recapped and aligned. In addition, with the auto-tuner t
I was able to get a nice Sony ST-J88B, first impressions; Very sensitive tuner, more than my Phillips 673, Tandberg 3001A, and those tuners are recapped and aligned. In addition, with the auto-tuner t
|
By
SirPaulGerman
·
|
|
New Tuner from McIntosh MR89 15 messages
It's not my cup of tea, but the specifications are certainly interesting to peruse! https://www.mcintoshlabs.com/products/tuners/MR89 Rick Price
It's not my cup of tea, but the specifications are certainly interesting to peruse! https://www.mcintoshlabs.com/products/tuners/MR89 Rick Price
|
By
Rick Price
·
|
|
Shipping and proper packing - plea for taking it seriously 21 messages
After receiving the second damaged component due to improper shipping technique in as many weeks, here's a plea for doing this right and a few recommendations to all doing this. This comes from experi
After receiving the second damaged component due to improper shipping technique in as many weeks, here's a plea for doing this right and a few recommendations to all doing this. This comes from experi
|
By
Radu Bogdan Dicher
·
|
|
NAD M4 9 messages
I recently bought a used NAD M4 ($500) from around 2008? Was wondering why it isn't in the database..and is it rare? Not much info about it anywhere.
I recently bought a used NAD M4 ($500) from around 2008? Was wondering why it isn't in the database..and is it rare? Not much info about it anywhere.
|
By
Daren
·
|
|
Test gear looking for a good home 6 messages
Hello all, Now that I've worked thru upgrading my test gear with some help from a few members in here, I have two surplus HP generators in very nice condition to part with. Anyone in the group interes
Hello all, Now that I've worked thru upgrading my test gear with some help from a few members in here, I have two surplus HP generators in very nice condition to part with. Anyone in the group interes
|
By
Mike Miller
·
|
|
Slightly OT - Inductor or Choke in Icom IC-R9000
I have this Icom in for repair. It's over 20 years old. Apart from the regular capacitor problems due to heat, there's this additional issue. On the PLL-B PCB, there's this 3mm SMD Inductor 100uH L49,
I have this Icom in for repair. It's over 20 years old. Apart from the regular capacitor problems due to heat, there's this additional issue. On the PLL-B PCB, there's this 3mm SMD Inductor 100uH L49,
|
By
M Yachad
·
|
|
OT: pocket - sized fm radio 24 messages
I need a pocket radio that has a reasonable amount of output power: enough to drive something a bit more demanding than a set of earbuds. I have a cheap little something from Amazoiks, and it works fi
I need a pocket radio that has a reasonable amount of output power: enough to drive something a bit more demanding than a set of earbuds. I have a cheap little something from Amazoiks, and it works fi
|
By
Michael Sloan
·
|
|
Yamaha CT-7000 Mods and filters 37 messages
I just got a Ct-7000 all original for what I would like to believe is a good price, anyway the tuner is older than I ( 1974) It has a few problems, no stereo light, or does not work, no sensitivity or
I just got a Ct-7000 all original for what I would like to believe is a good price, anyway the tuner is older than I ( 1974) It has a few problems, no stereo light, or does not work, no sensitivity or
|
By
SirPaulGerman
·
|
|
Yamaha T-2 dial lights replacement 5 messages
Wondering if anyone has a fresh recollection of replacing the dial lights on a Yamaha T-2. It seems there's quite a bit of disassembly involved, certainly the bottom plate, and likely the front panel
Wondering if anyone has a fresh recollection of replacing the dial lights on a Yamaha T-2. It seems there's quite a bit of disassembly involved, certainly the bottom plate, and likely the front panel
|
By
Radu Bogdan Dicher
·
|
|
File Notifications
#file-notice
Radu Bogdan Dicher <vondicher@...> added folder /Yamaha T-2 Dial Lights Replacement guideline The following files and folders have been uploaded to the Files area of the FMtuners@groups.io group. /Yam
Radu Bogdan Dicher <vondicher@...> added folder /Yamaha T-2 Dial Lights Replacement guideline The following files and folders have been uploaded to the Files area of the FMtuners@groups.io group. /Yam
|
By
Group Notification
·
|
|
Kenwood KT-7500 - restoration work and returns 10 messages
I thought the work on the KT-7500 deserves its own thread, as what I though will be a quick and rather boring project starts returning far more than I anticipated. This tuner started from completely d
I thought the work on the KT-7500 deserves its own thread, as what I though will be a quick and rather boring project starts returning far more than I anticipated. This tuner started from completely d
|
By
Radu Bogdan Dicher
·
|
|
Photo Notifications
#photo-notice
Radu Bogdan Dicher <vondicher@...> added the album Kenwood KT-7500 The following photos have been uploaded to the Kenwood KT-7500 album of the FMtuners@groups.io group. 20220612_233732.JPG 20220612_23
Radu Bogdan Dicher <vondicher@...> added the album Kenwood KT-7500 The following photos have been uploaded to the Kenwood KT-7500 album of the FMtuners@groups.io group. 20220612_233732.JPG 20220612_23
|
By
Group Notification
·
|