Such a drop is certainly excessive. By providing +5.0 V from an external suuply directly to the encoder you can distinguish between a bad encoder and a bad supply, and then make the repair as needed.
This is incorrect and misleading. Whenever an AC current flows on a wire, there is an accompanying and inseparable AC electromagnetic field surrounding the wire. And the said AC field propagates in a
In theory, yes, provided that the choke impedance is much higher than antenna impedance. In practice, this means choke impedance >=10 kOhm, which can be achieved only with special attention, and the
Heat is produced in both the wire and the core. A lossy core wound with a small number of turns, and subjected to substantial common mode VOLTAGE will overheat. 73, Sinisa YT1NT, VE3EA
... Steve's analysis is correct. The same analysis repeated for a high impedance antenna will quickly reveal difficulties of using a ferrite chokes with antenna impedances in the hundreds of Ohms ran
All cores are lossy, and their loss manifests itself by heat generation within the core whenever there is an RF field inside the core. This has nothing to do with wires. running 1.5kW through a chok
Jerry's treatment of choke baluns has a serious shortcoming: he tested his choke baluns in transmission mode only (i.e. as transmission lines), entirely neglecting the critical aspect of common mode
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
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
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
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
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
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
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
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