Hi Reid, First of all, I want to thank you for all the time and effort you've invested into enhancing and customizing Thetis for the HL2! I'm

120Ohm for R55. > Search this group if you want more details on R55: > > https://groups.google.com/g/hermes-lite/search?q=R55 > > You can tweak the power output

by adjusting R55. See the schematics at www.hermeslite.com and search this group for R55 https://groups.google.com/g/hermes-lite/search?q=R55 - Lower the gain of the HL2 amp

Recently I had this idea, to combine two PCBs into one. Specifically Hermes-Lite 2.0 + N2ADR Filter Card. I drew a new PCB named HERMES TRX. [image:

The additional cable should have no effect on the output signal. It does, however, damp the input signal by about 3 dB since the feedback is parallel

changed the R55 resistor to 220 Ohm which > has reduced the power output of the HL2 by 2.5db. > > Regards > > Glenn Holt > G8NOF > > On Wednesday, 26 January 2022

value of R55. Search for R55 in this group. > > 73, > > Steve > kf7o > > > On Sunday, July 12, 2020 at 5:11:20 PM UTC-7, Jeff Scaparra wrote: >> >> Hello

value of R55. See the OPA2677 datasheet for details. 73, Steve kf7o On Wednesday, June 3, 2020 at 12:25:28 PM UTC-7, Alex Pressl wrote: > > I use this as a handy dBm tool when working

resistor to R55, bringing the gain of the HL2 PA down. This way, I can get at least some dynamic range in the PowerSDR drive level setting. I'll put a bigger attenuator between the

> of R55. What heat sink are you using? Usually an entire enclosure with >> pressure and thermal compound on the rail is required for proper heat >> dissipation. >

value of R55. Or you can decrease the drive to the PA by > increasing the value of R55. > > CWX is something on my to do list. You can also hook up a k3ng keyer > . You might also be

to change R55, but that probably isn't necessary. (the 100 ohm resistor was > not included) I see over 5W on all bands. The bias looks good." > > I suspect that my wattmeter

found. R55 will remain at 120 Ohms. >>>> >>>> ** The open source logo will be added back to the silkscreen. It was >>>> accidentally removed

with replacing R55 with a 100 Ohm resistor to increase > the RF TX driver output. This added about another 0.5 dB also. I looked at > harmonics and they were no worse than before.

value of R55. Search this list for R55 or see the OPA2677 datasheet for more details. I think Claudio is the only one to test the RD15HVF1 option. Are you after more power? The current LDMOS

did change R55 when I had the first > 0106.jic installed and brought the output power up to 4.8 watts max. > > Now hoping that hl2b5up.jic will stay friendly for me but would like

, dropping R55 to 100 ohms bumps this up to over 17dbm >> which allows the PA to make well over 5 watts on all bands. >> >> Cheers! >> 73 de W3DRK >> >>

value for R55 (I must have looked at an old BOM?). It now passes the RPi test. My last glitch was installing B104 and B107 by mistake. Bias shot up to 400 mA even at zero on the sliders. I don

Hi Group, Attached is a preliminary BOM for beta5. This BOM only includes components that the assembly house will install. There is now a wiki page

** R55 now 120 Ohms to not overdrive PA. >> ** To adjust LED bright and connect to 3.3V supply, R30,R31,R32,R33 now >> DNI, R133,R134 now 270Ohm, R131,R132 now 10K. >

go to R55 and B75. Can you try filling the vias near pin 2 and 6 of U9 with solder to see if this makes a difference? You may have to access one of the vias from the bottom side. 73, Steve KF7O

PowerSDR v3.3.9. there is no different result between Quisk Spot and PSDR TUNE. I think the output signal is as clean as FEv142 or better. I already changed R55 to 120 ohms. 73, Taka ji1udd

for > R55, but that was supposed to be changed to 120 Ohms as it is in my beta2 > build. My mistake. Testers should change R55 to 120 Ohm to not over drive > the PA, or else be careful

ohms in R55 input to limit gain and now am > wondering what value resistor to use for R97, R98 (same value) assuming > that R94 and R100 stay the same for attenuation into the PA stage

and with R55 about 100 ohms. That requires the user to specify less than 100% power as a Tx Level, but allows headroom for flattening output across the bands and allows for variable filter

by setting R55 to 120 >>>>>> Ohms. I see max output at the low power output of ~17dBm and the PA never >>>>>> goes higher than 39dBm with full TxDAC

change the R55 value and so the gain of the driver stage. It's true that we still have 7.5 dB of gain adjustment in the TxPGA but I was spoiled by the overall 19.5 dB range when we had the

Hi All, The BOM generation scripts are working for PDFs. These scripts allow me to create custom BOMs for different build options, different suppliers,

Hello List, Although I'm not quite at the end of my to do list, I want to put the design files out for final review. Here is how you can help: -

Hi List, I've dropped the TX LPFs from the first prototype and am going with a 10x10 cm board at first. It still may take several prototype