i just picked up this PS .. fan is not noisy at all , having the powerpole connectors on the front is ok to me .. tested the actual output against the display and its right on the money .. paid $125 .. what more can u ask for ?
I will never tune with below 30w, just because when you increase the power you will be way overloaded with real high grid. You will know when amp is overloaded as you run out of load adjustment
Hi I hv 2060A. I use it to tune before using my sb1000 amp. I made a chart for three sections on each band. Using the chart as a starting point and then adjusting c1 and c2 for lowest swr’s. Here is where I am confused. In the manual, it states c1and c2 dials should be set to 100 to provide max capacitance. ??? Next is the sensitivity knob, how is that used? The manual is very brief on this. Thanku so much. Billy
I have a similar problem with Axiom 13.8 V , 30A SMPs . Then I opened the unit cover , put few DIODES in series with Fan in its positive lead and reduced its speed . Fan Noice reduced , cooling effect same , Radio operation undisturbed . 😂 ( VU2RMU)
Just finished repairing and upgrading an SB-200 I got on EBay years ago, with a new power supply board and e-caps plus a soft start and soft key from Harbach Electronics. Tuned up using the original instruction manual but this video made things much more clear!
Both are dipoles if you are comparing a halfwave wire to a bazooka. There is zero difference other than the Bazooka may be slightly quieter and have a little more BW. The Bazooka is simply a stub fed dipole. The coax sections match the feed impedance at where it’s tapped. This may offer a cleaner pattern and greater BW.
On my recently acquired SB-200; the Load adjustment is bottomed out at "1" on the knob - all the way left to achieve maximum possible output. Is this normal? The SWR on the 75M Dipole is near 1.1 to 1; GRID current is near bottom of range area; and, PLATE current is 200ma when P-OUT from Yaesu 2000D (In to Amp) is 25 watts and P-OUT from Amp is 300 using CW mode into dummy load or antenna when testing.
On 80 meters it is normal ,especially low in the band and/or with reduced power, for the load control to be all the way to the left , maximum capacitancy.
YOu adjust the input power in several phases, while tuning for maximum output (REL Meter) with th TUNE and LOAD controls. Note tht after peaking output with the TUNE control, adjusting the LOAD reduces the output power, as seen in the video. However, after increasing the LOAD control a little bit, you need to readjust the TUNE control for maximum output. You play the two controls off one another for maximum output. Then, you increase the drive from the exciter and do it again. You keep doing this until you got full drive from the exciter, which can be determined by looking at the GRID current meter. When the GRID current reaches its maximum value, specified in the owner's manual, you do not drive the amplifier with any more input power. You just readjust the TUNE and LOAD controls one last time for maximum OUTPUT, and then turn the LOAD control a few degrees clockwise to drop the grid current down a little off its maximum rated value. Then you lower the exciter drive slighty to get better life of of the tubes.
I’ll save you the agony from this horrible video. Complete the following. Open the bottom of the radio. Find JP3005 pin 5 . Short the pads out with a soldering iron. Factory reset the radio by holding FAST and LOCK at the same time. Done.
You never addressed the proper way to read the SWR. You need to set the meter to REL Power, adjust the REL PWR knob so that the meter is at the "set" and then read the SWR with the meter on SWR.
I have lot of dipols. I also have a 10 meter double bazooka and a 40 meter one. The double bazooka does not under for any dipol. Except it has a much lower noise floor. You can't screw up the SWR. You can trow it to the ground and even then make great contacts with it. They are broadband which can be handy so i can use for example 10 and 11 meters with the same antenna. Mine is resonant 1:1 on 11 and 1:1.5 on 10. Good antenna's nothing wrong with. I like them.
Where's the comparison? Double bazooka is nice for a single band and seem to be quieter. OCF offers better use over more bands. It's all about what you want. Compromise is apart of any system that is away from the normal single band dipole.
Apples and oranges both are different . Double Bazooka monoband - quiet - higher gain direct fed. Off center band dipole multi band harmonic antenna requires a 4 to 1 balun and a lot more noise Both work but the double bazooka ot performs at its mono band frequency like a full wave loop no static
I have a SB200 and a Yaesu FT 707 with a little relay between. them. Where i must use a antena tuner,, between exjter aad amplifier or after the amplifier ? What is the better way to connect them ? TKS and 73
I have the icom 729 and the sb-200 I have never used an amp I have the coax all setup and the power cord plugged in but not sure if I am missing anything.the radio does not have alc and there a alc Jack on back of the amp
You can use it without the ALC. Please double-check the voltage on the TX relay for the icom 729. The Sb200 uses around 120v and will damage your icom 729
