TYT TH-9000D Plus Caution
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I have been investigating the TYT TH-9000D Plus as a possible low-cost alternative to the now obsolete Alinco DR-135 series for Winlink VARA FM WIDE.? While checking the output spectrum for an anomaly found in the Alinco Mark 3 versions, I discovered that two of my three TYT TH-9000D Plus radio have a serious defect in the transmitter.? See the attached spectrum analyzer captures of a mike key down with no modulation.? Strong side bands covering the 2m band and extending outside the band.? ? These radios were bought on Amazon and the first is okay, but the next two arrived with the defect.? This is an insidious failure because the radio still receives and transmits and can still make contacts. ?The failure is only evident on a spectrum display (or if you cause interference and it is reported to you).? This issue shous up at high (65W) and mid (25W) power bit they look good at low power.? I think 65 Watts is pushing it for the PA module used so I plan to only operate my good radio at mid, 25 Watt power. |
开云体育Bob,
Stephen is correct.? There are several companies, including Masters Communications, that makes an for the TYT TH-9000D radio.? However - unlike the Alinco DR-X35, the TYT TH-9000D is NOT wide band capable.? It only has filtered audio available at the plug on the motherboard - IE "1200 Baud" type of audio. I additionally sell .? This allows an to be used between the radio and MD6 equipped radio interface like a DRA-36M.? Because the TYT TH-9000 is only narrow band capable - all baud rate jumpers need to be set to the "1200" position, as 9600 is not a valid choice. So regardless of the radio interface you choose - your throughput is going to be narrow. Kevin W3KKC Owner Masters Communications. On 3/10/2025 5:53 PM, Bob W0EG via groups.io wrote:
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开云体育Bob,
I recommend you look at the Yaesu FTM-6000 as an alternative choice, considering currently available radios.? This radio has a dedicated data port and is 100% VARA FM Wide capable and when paired with the appropriate DRA and cable, you can work any normal Winlink mode as fast as it gets.? Considering this is a dual-band radio, the value is on par with the Alinco DR-X35 series radios, which are commonly selling for $250 + on the used market.? It also doesn't have the spurious emission issue that you reported on with later MKIII Alinco's. Many of the Yaesu FTM radios require a proprietary Mini-DIN-10 cable or CT-164 adapter to connect the sound card interface to their data port.? I have a custom pre-made MD10 male to MD6 male cable that works on any Mini-DIN-10 equipped FTM Series mobile radio.? It's called the .? The FTM-6000 radio pairs well with a DRA-50 or DRA-50M, and provides for the fastest possible VARA FM Wide speeds. I have no affiliation with Yaesu - I'm simply a satisfied customer. Kevin W3KKC Masters Communications On 3/10/2025 8:51 PM, Bob W0EG via groups.io wrote:
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Kevin Custer