ANAN-7000DLE MKII now available without internal PC

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w-u-2-o
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ANAN-7000DLE MKII now available without internal PC

Postby w-u-2-o » Sat Feb 02, 2019 2:36 pm

NC3Z
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Re: ANAN-7000DLE MKII now available without internal PC

Postby NC3Z » Sat Feb 02, 2019 2:44 pm

Not a fan of that case style, but wonder what they did to get to these 2 listed improvements:

2. PA board improvements for higher duty cycle, 100% ICAS duty cycle supported.
3. Tx Signal generation redesigned to improve SNR at low power levels.
Gary NC3Z
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w9ac
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Re: ANAN-7000DLE MKII now available without internal PC

Postby w9ac » Mon Feb 04, 2019 1:05 pm

NC3Z wrote:Not a fan of that case style, but wonder what they did to get to these 2 listed improvements:

2. PA board improvements for higher duty cycle, 100% ICAS duty cycle supported.
3. Tx Signal generation redesigned to improve SNR at low power levels.


I don't like the larger size either, but I suppose anything that assists with heat management is good. I've been playing a "shell game" on my desktop, trying to figure out placement that works while not disrupting present operating ergonomics.

Concerning points 2 & 3, see Ahbi's reply from the Apache mail list:

"So far as the improvements in the hardware are concerned:

"1. Bigger heatsink
2. Changed components of the PA LPF and SWR bridge for higher duty cycle, ie the radio is more rugged now.
3. The Tx chain now controls power using a digital step attenuator and the DAC is now always driven 100%, this results in higher SNR at low power levels."


Paul, W9AC
Bryan W4WMT
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Re: ANAN-7000DLE MKII now available without internal PC

Postby Bryan W4WMT » Mon Feb 04, 2019 1:46 pm

Take a look at the Apache Labs website this morning.
The old style 7000DLE is no longer in the product lineup.
It was still there as late as Saturday, when I last looked.

73, Bryan W4WMT
NC3Z
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Re: ANAN-7000DLE MKII now available without internal PC

Postby NC3Z » Mon Feb 04, 2019 2:32 pm

Wonder if there is a mod path to update older boards, or is it not significant enough? I only run my 7000 @ 30W to drive my amp anyways.
Gary NC3Z
dl4zbg
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Re: ANAN-7000DLE MKII now available without internal PC

Postby dl4zbg » Wed Feb 20, 2019 6:28 pm

Hopefully there will be PIN diode switching available in the next future..... 8-)

Volker

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Re: ANAN-7000DLE MKII now available without internal PC

Postby Jim » Wed Feb 20, 2019 8:05 pm

That would be very nice.

73 de KE4WY Jim
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w9ac
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Re: ANAN-7000DLE MKII now available without internal PC

Postby w9ac » Sat Feb 23, 2019 8:15 pm

The PIN diode T/R switching circuit is easily implemented. However, to do it right means upconverting +12V DC to over 100V so the receive PIN diodes can be reverse-biased during transmit. Otherwise, a high SWR at the RF output port (e.g., accidental open or short) will cause the receive PINs to conduct during transmit, therby exposing the front-end to transnit power. High speed SWR circuits together with an incandescent lamp on the Rx input can help but it's no substitute for high reverse bias V on the Rx diodes.

Bottom line: it's not as easy as replacing a relay with a handful of PIN diodes and chokes.

Paul, W9AC

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