diff --git a/tech/Modulation.wiki b/tech/Modulation.wiki
index ae64609..bea0ab8 100644
--- a/tech/Modulation.wiki
+++ b/tech/Modulation.wiki
@@ -29,6 +29,9 @@ signal is changed to encode information. The signal as a result will take up
 space both above and below the carrier, called Upper Side Band (USB) and Lower
 Side Band (LSB).
 
+AM has a Peak Envelope Power. This is determined by the max power of the
+transmitter, and the Mic gain.
+
 === SSB ===
 
 Bandwidth: 2-3khz (voice); 500-3000hz (digital)
@@ -44,6 +47,9 @@ narrower portion of the signal, it is often used for long distance VHF and UHF
 Standards have formed around SSB, and wether to use USB or LSB on different
 frequencies. If < 10Mhz, LSB. Else if >= 10Mhz, USB.
 
+SSB has a Peak Envelope Power. This is determined by the max power of the
+transmitter, and the Mic gain.
+
 === FM/PM ===
 
 Bandwidth: 10-15khz (voice); 150khz (broadcast)
@@ -52,4 +58,14 @@ Frequency Modulation (FM) and Phase Modulation (PM) are two similar types of
 modulation where the signal is encoded by changing either the frequency of the
 signal, or the phase of the signal.
 
+Because FM/PM does not change in amplitude, the power output is fixed.
+Therefore, the PEP is fixed as well.
 
+== Overmodulation ==
+
+Over modulation or splattering is when the signal is to heavily modulated,
+making it use to much bandwidth. This is generally negative, and can often be
+fixed by speaking softly, changing mic gain, or moving away from the mic. 
+
+The sound it makes to the reciever is a 'breaking up' sound, where distortion
+occours on voice peaks.
diff --git a/tech/frequency_range.wiki b/tech/frequency_range.wiki
index 442a478..8b9b1d2 100644
--- a/tech/frequency_range.wiki
+++ b/tech/frequency_range.wiki
@@ -27,3 +27,35 @@ A shorthand is
 WL = 300 / f
 
 Where f is in Mhz
+
+== Frequency to Wavelength ==
+
+Below are the common wavelength and frequencies
+
+| Frequency (Mhz) | Wavelength |
+----------------------------------------
+| HF/MF | HF/MF  |
+| 1.8   | 160m   |
+| 3.5   | 80m    |
+| 5     | 60m    |
+| 7     | 40m    |
+| 10    | 30m    |
+| 14    | 20m    |
+| 18    | 17m    |
+| 21    | 15m    |
+| 24    | 12m    |
+| 28    | 10m    |
+| VHF   | VHF    |
+| 50    | 6m     |
+| 144   | 2m     |
+| 222   | 1.25m  |
+| UHF   | UHF    |
+| 440   | 70cm   |
+| 902   | 33cm   |
+| 1240  | 23cm   |
+| 2300  | 13cm   |
+
+
+
+
+