Basic facts of physics are as follows. 1. Whenever an AC current flows, there is radiation. There are no exceptions. Also, there are no additional conditions. All that is needed is an AC current flow
Ever heard of a coax with the inside current not matching the center conductor current? Exact matching is the essence of coax. If it's coaxial, then the currents match. It's physically impossible fo
No, bandscope uses mixer output directly, prior to filtering, exactly as in Orion. No, Orion has a separate ADC fed from main RX mixer output. IF filtering would certainly affect bandscope operation,
DE N6KB It's worse than that. There are TWO independent frequency references. The obvious one is the TCXO, and the other one is the codec clock. The ways they are combined in the main RX and in the s
Correct. Correct, but irrelevant. Correct. Frequency synthesis boils down to following formulas: nominal Main RX Freq = A * TCXO + B * Codec clock nominal Sub RX Freq = C * TCXO + D * Codec clock Whe
... Dear OM, do you have any measurement results? 73, Sinisa YT1NT, VE3EA _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman
I enjoyed the following from Beyerdynamic: MC494, MCE530, MC930, Opus 54, MMX300 (actually a headset). MC930 is true condenser, others are electret. Each of them provides exceptional sound at moderat
An arbitrary point can be taken as a potential reference. The choice itself has no physical consequences. It's just a notational convenience. 73, Sinisa YT1NT, VE3EA ________________________________
Exactly what I was trying to say... ...if there is such a thing as nature's reference point, which I doubt. 73, Sinisa YT1NT, VE3EA _______________________________________________ TenTec mailing list
Not sure about FT1000D, but FT1000MP/MkV actually performs RF clipping, and it's very cheap, using TA7302P FM IF Amplifier. Users of "external RF Clippers" must be aware of the fact that the processe
Board A7, schematic file 81917_13.PDF, chip U501 (M48T35AV). With DIP version of the chip, the battery is an integral part of the chip. With SOIC version of the chip, the battery can be separated and
Look for M48T35AV chip at the left side of the logic (CPU & DSP) board. The battery (and the crystal for the unused real time clock) is within the black rectangular "SNAPHAT". 73, Sinisa YT1NT, VE3E
Adjust the ALC SET pot (R179) on the A5 IF Board, beneath the speaker. 73, Sinisa YT1NT, VE3EA _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.c
Hi Rick, "full power into 3:1 SWR" is just a myth. Did you ever read such a claim made by TenTec? There is nothing inside TenTec transceivers to make them to DELIVER full power into a mismatched load
Your thinking is correct, apart from those 40 W being actually 36 W (60 % of the forward power). The technical fact is that the only difference between a TenTec TX and, say, a Kenwood TX is lack of c
I have two small items, shouldn't be difficult to fix. 1. In band stacking registers please preserve the full filter state. Currently only BW is preserved, and PBT is not. This makes it very inconven
Receiver quality is a much more complex thing than, say, IM dynamic range. IM dynamic range is a kind of limit. Under specific circumstances, if the limit is not exceeded, the IM specification is irr
That would be a very good way of specification, if only it was true. "SWR <= 10" is a unambiguous reference to a set of complex impedances, i.e. those inside a certain circle on a Smith diagram. But
Has anyone suceeded in balancing Orion 565 VFO knobs? On my Orion 565, both VFO knobs (when left to themselves) return to the same angular position, which is precisely the same on both encoder shafts
It's great to know that knobs on 566 do not drift by themselves. I managed today to balance both of my 565 VFO knobs. It was easier than expected, took me 15 minutes per knob. Using an 8 mm slot dril