Uniden 2020 Informazioni Techniche Pagina 1

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Tempo 2020 Restoration Notes
March 2, 2014 Updated with X-LOCK, VFO Stabilizer Successfully Installed
Added Long Term Heat Testing and X-LOCK Changes to Simplify Uses Existing RIT VFO Varactor
Network Now vs. the X-LOCK supplied design.
Randy Best W7CPA
http://www.arizona-am.net/PHOENIX/W7CPA/index.html
SN = 6060025
I’ve written up my restoration notes in hopes that they might be useful to those that take on a 2020
restoration. I collaborated with N4PL on many of these tasty challenges. There are many useful
messages and files on the Yahoo Tempo 2020 Group to learn from. This Group is the best I have ever
seen WRT good technical information thanks to N4PL, KX4OM and others. The first restoration step is
to join: TEMPO_202[email protected]m
Front View Speaker, Tempo 2020, Stock Microphone and External VFO Model 8010
The Temp 2020 is one of the finest early transceivers I have ever used.
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Sommario

Pagina 1 - Tempo 2020 Restoration Notes

Tempo 2020 Restoration Notes March 2, 2014 – Updated with X-LOCK, VFO Stabilizer Successfully Installed Added Long Term Heat Testing and X-LOCK Chang

Pagina 2

The Model 810 external VFO is relatively easy to add the X-LOCK. You could also do the internal VFO with more mechanical complexity. Only the external

Pagina 3 - Sprocket

Conclusions  The oddball hybrid frequency display is amazingly accurate and linear, end to end, on each segment – better than all my vacuum tube Co

Pagina 4

Photo Gallery Back Panel

Pagina 5

Driver Board with DD-103 Interface View Bottom View

Pagina 6

Top View Unique Hybrid Display

Pagina 7

PA Bottom, Note Proper Stud Mounted 200 Volt Zener Diode Operations Board (085) Removed for T/R Delta Diode Fix

Pagina 8

Most Excellent X-LOCK Board VFO Can Removed, 10k Resistor and 2 Connections

Pagina 9

VFO Can Back On and X-LOCK Board Mounted to the Side with Velco

Pagina 11 - Conclusions

Front View I would then download the user and alignment manuals and all the N4PL files plus the 3 flavors of sprocket repair. The annotated schemati

Pagina 12 - Photo Gallery

3. Measure driver and PA tube voltages. The Alignment Manual has tables with the proper voltages. Make sure the 6146B screen grid 200 VDC regulation

Pagina 13

Original Cracked Nylon with C-clips Fix Attempt

Pagina 14

New Sprockets and Chains – Whew! Sprocket Alignment The pre-selector alignment is well documented where the chain tensioner needs to go etc. The ba

Pagina 15

c. If you are really anal, you can now rotate the band switch through all positions and inspect the switch contact positions for somewhere close to b

Pagina 16

Low MIC Gain The stock Tempo high output hand mic required the mic gain almost fully clockwise and some bands would never indicate ALC action. I unde

Pagina 17

LO Card Band Pass Filter Adjustment My bad past experience tells me never mess with band pass filters to avoid damaging unobtanium coils etc. Since I

Pagina 18

under the switch. The parts list does not note matched, but they sure need to be reasonably matched if you want to transmit and receive on the same fr

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